diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs b/Documentation/ABI/testing/sysfs-fs-f2fs
index bd8a0d1..4bb93a0 100644
--- a/Documentation/ABI/testing/sysfs-fs-f2fs
+++ b/Documentation/ABI/testing/sysfs-fs-f2fs
@@ -323,3 +323,27 @@
 Date:		February 2020
 Contact:	"Jaegeuk Kim" <jaegeuk@kernel.org>
 Description:	Show the mounted time in secs of this partition.
+
+What:		/sys/fs/f2fs/<disk>/data_io_flag
+Date:		April 2020
+Contact:	"Jaegeuk Kim" <jaegeuk@kernel.org>
+Description:	Give a way to attach REQ_META|FUA to data writes
+		given temperature-based bits. Now the bits indicate:
+		*      REQ_META     |      REQ_FUA      |
+		*    5 |    4 |   3 |    2 |    1 |   0 |
+		* Cold | Warm | Hot | Cold | Warm | Hot |
+
+What:		/sys/fs/f2fs/<disk>/node_io_flag
+Date:		June 2020
+Contact:	"Jaegeuk Kim" <jaegeuk@kernel.org>
+Description:	Give a way to attach REQ_META|FUA to node writes
+		given temperature-based bits. Now the bits indicate:
+		*      REQ_META     |      REQ_FUA      |
+		*    5 |    4 |   3 |    2 |    1 |   0 |
+		* Cold | Warm | Hot | Cold | Warm | Hot |
+
+What:		/sys/fs/f2fs/<disk>/iostat_period_ms
+Date:		April 2020
+Contact:	"Daeho Jeong" <daehojeong@google.com>
+Description:	Give a way to change iostat_period time. 3secs by default.
+		The new iostat trace gives stats gap given the period.
diff --git a/Documentation/filesystems/f2fs.rst b/Documentation/filesystems/f2fs.rst
index 4218ac6..099d45a 100644
--- a/Documentation/filesystems/f2fs.rst
+++ b/Documentation/filesystems/f2fs.rst
@@ -248,7 +248,7 @@
                        would be unusable can be viewed at /sys/fs/f2fs/<disk>/unusable
                        This space is reclaimed once checkpoint=enable.
 compress_algorithm=%s  Control compress algorithm, currently f2fs supports "lzo",
-                       "lz4" and "zstd" algorithm.
+                       "lz4", "zstd" and "lzo-rle" algorithm.
 compress_log_size=%u   Support configuring compress cluster size, the size will
                        be 4KB * (1 << %u), 16KB is minimum size, also it's
                        default size.
diff --git a/fs/f2fs/Kconfig b/fs/f2fs/Kconfig
index bb68d21..d13c5c6 100644
--- a/fs/f2fs/Kconfig
+++ b/fs/f2fs/Kconfig
@@ -127,3 +127,13 @@
 	default y
 	help
 	  Support ZSTD compress algorithm, if unsure, say Y.
+
+config F2FS_FS_LZORLE
+	bool "LZO-RLE compression support"
+	depends on F2FS_FS_COMPRESSION
+	depends on F2FS_FS_LZO
+	select LZO_COMPRESS
+	select LZO_DECOMPRESS
+	default y
+	help
+	  Support LZO-RLE compress algorithm, if unsure, say Y.
diff --git a/fs/f2fs/acl.h b/fs/f2fs/acl.h
index b96823c..124868c 100644
--- a/fs/f2fs/acl.h
+++ b/fs/f2fs/acl.h
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: GPL-2.0
+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  * fs/f2fs/acl.h
  *
diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index 852890b..2360649 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -86,6 +86,8 @@ static struct page *__get_meta_page(struct f2fs_sb_info *sbi, pgoff_t index,
 		return ERR_PTR(err);
 	}
 
+	f2fs_update_iostat(sbi, FS_META_READ_IO, F2FS_BLKSIZE);
+
 	lock_page(page);
 	if (unlikely(page->mapping != mapping)) {
 		f2fs_put_page(page, 1);
@@ -220,6 +222,7 @@ int f2fs_ra_meta_pages(struct f2fs_sb_info *sbi, block_t start, int nrpages,
 		.is_por = (type == META_POR),
 	};
 	struct blk_plug plug;
+	int err;
 
 	if (unlikely(type == META_POR))
 		fio.op_flags &= ~REQ_META;
@@ -263,8 +266,11 @@ int f2fs_ra_meta_pages(struct f2fs_sb_info *sbi, block_t start, int nrpages,
 		}
 
 		fio.page = page;
-		f2fs_submit_page_bio(&fio);
-		f2fs_put_page(page, 0);
+		err = f2fs_submit_page_bio(&fio);
+		f2fs_put_page(page, err ? 1 : 0);
+
+		if (!err)
+			f2fs_update_iostat(sbi, FS_META_READ_IO, F2FS_BLKSIZE);
 	}
 out:
 	blk_finish_plug(&plug);
@@ -889,8 +895,8 @@ int f2fs_get_valid_checkpoint(struct f2fs_sb_info *sbi)
 	int i;
 	int err;
 
-	sbi->ckpt = f2fs_kzalloc(sbi, array_size(blk_size, cp_blks),
-				 GFP_KERNEL);
+	sbi->ckpt = f2fs_kvzalloc(sbi, array_size(blk_size, cp_blks),
+				  GFP_KERNEL);
 	if (!sbi->ckpt)
 		return -ENOMEM;
 	/*
@@ -1160,10 +1166,12 @@ static int block_operations(struct f2fs_sb_info *sbi)
 		.nr_to_write = LONG_MAX,
 		.for_reclaim = 0,
 	};
-	struct blk_plug plug;
 	int err = 0, cnt = 0;
 
-	blk_start_plug(&plug);
+	/*
+	 * Let's flush inline_data in dirty node pages.
+	 */
+	f2fs_flush_inline_data(sbi);
 
 retry_flush_quotas:
 	f2fs_lock_all(sbi);
@@ -1192,7 +1200,7 @@ static int block_operations(struct f2fs_sb_info *sbi)
 		f2fs_unlock_all(sbi);
 		err = f2fs_sync_dirty_inodes(sbi, DIR_INODE);
 		if (err)
-			goto out;
+			return err;
 		cond_resched();
 		goto retry_flush_quotas;
 	}
@@ -1208,7 +1216,7 @@ static int block_operations(struct f2fs_sb_info *sbi)
 		f2fs_unlock_all(sbi);
 		err = f2fs_sync_inode_meta(sbi);
 		if (err)
-			goto out;
+			return err;
 		cond_resched();
 		goto retry_flush_quotas;
 	}
@@ -1224,7 +1232,7 @@ static int block_operations(struct f2fs_sb_info *sbi)
 		if (err) {
 			up_write(&sbi->node_change);
 			f2fs_unlock_all(sbi);
-			goto out;
+			return err;
 		}
 		cond_resched();
 		goto retry_flush_nodes;
@@ -1236,8 +1244,6 @@ static int block_operations(struct f2fs_sb_info *sbi)
 	 */
 	__prepare_cp_block(sbi);
 	up_write(&sbi->node_change);
-out:
-	blk_finish_plug(&plug);
 	return err;
 }
 
@@ -1260,6 +1266,9 @@ void f2fs_wait_on_all_pages(struct f2fs_sb_info *sbi, int type)
 		if (unlikely(f2fs_cp_error(sbi)))
 			break;
 
+		if (type == F2FS_DIRTY_META)
+			f2fs_sync_meta_pages(sbi, META, LONG_MAX,
+							FS_CP_META_IO);
 		io_schedule_timeout(DEFAULT_IO_TIMEOUT);
 	}
 	finish_wait(&sbi->cp_wait, &wait);
@@ -1553,7 +1562,8 @@ int f2fs_write_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
 			return 0;
 		f2fs_warn(sbi, "Start checkpoint disabled!");
 	}
-	mutex_lock(&sbi->cp_mutex);
+	if (cpc->reason != CP_RESIZE)
+		mutex_lock(&sbi->cp_mutex);
 
 	if (!is_sbi_flag_set(sbi, SBI_IS_DIRTY) &&
 		((cpc->reason & CP_FASTBOOT) || (cpc->reason & CP_SYNC) ||
@@ -1622,7 +1632,8 @@ int f2fs_write_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
 	f2fs_update_time(sbi, CP_TIME);
 	trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "finish checkpoint");
 out:
-	mutex_unlock(&sbi->cp_mutex);
+	if (cpc->reason != CP_RESIZE)
+		mutex_unlock(&sbi->cp_mutex);
 	return err;
 }
 
diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c
index df7b2d1..1e02a8c 100644
--- a/fs/f2fs/compress.c
+++ b/fs/f2fs/compress.c
@@ -65,15 +65,6 @@ static void f2fs_set_compressed_page(struct page *page,
 	page->mapping = inode->i_mapping;
 }
 
-static void f2fs_put_compressed_page(struct page *page)
-{
-	set_page_private(page, (unsigned long)NULL);
-	ClearPagePrivate(page);
-	page->mapping = NULL;
-	unlock_page(page);
-	put_page(page);
-}
-
 static void f2fs_drop_rpages(struct compress_ctx *cc, int len, bool unlock)
 {
 	int i;
@@ -98,8 +89,7 @@ static void f2fs_unlock_rpages(struct compress_ctx *cc, int len)
 	f2fs_drop_rpages(cc, len, true);
 }
 
-static void f2fs_put_rpages_mapping(struct compress_ctx *cc,
-				struct address_space *mapping,
+static void f2fs_put_rpages_mapping(struct address_space *mapping,
 				pgoff_t start, int len)
 {
 	int i;
@@ -236,7 +226,12 @@ static int lz4_init_compress_ctx(struct compress_ctx *cc)
 	if (!cc->private)
 		return -ENOMEM;
 
-	cc->clen = LZ4_compressBound(PAGE_SIZE << cc->log_cluster_size);
+	/*
+	 * we do not change cc->clen to LZ4_compressBound(inputsize) to
+	 * adapt worst compress case, because lz4 compressor can handle
+	 * output budget properly.
+	 */
+	cc->clen = cc->rlen - PAGE_SIZE - COMPRESS_HEADER_SIZE;
 	return 0;
 }
 
@@ -252,11 +247,9 @@ static int lz4_compress_pages(struct compress_ctx *cc)
 
 	len = LZ4_compress_default(cc->rbuf, cc->cbuf->cdata, cc->rlen,
 						cc->clen, cc->private);
-	if (!len) {
-		printk_ratelimited("%sF2FS-fs (%s): lz4 compress failed\n",
-				KERN_ERR, F2FS_I_SB(cc->inode)->sb->s_id);
-		return -EIO;
-	}
+	if (!len)
+		return -EAGAIN;
+
 	cc->clen = len;
 	return 0;
 }
@@ -366,6 +359,13 @@ static int zstd_compress_pages(struct compress_ctx *cc)
 		return -EIO;
 	}
 
+	/*
+	 * there is compressed data remained in intermediate buffer due to
+	 * no more space in cbuf.cdata
+	 */
+	if (ret)
+		return -EAGAIN;
+
 	cc->clen = outbuf.pos;
 	return 0;
 }
@@ -451,6 +451,31 @@ static const struct f2fs_compress_ops f2fs_zstd_ops = {
 };
 #endif
 
+#ifdef CONFIG_F2FS_FS_LZO
+#ifdef CONFIG_F2FS_FS_LZORLE
+static int lzorle_compress_pages(struct compress_ctx *cc)
+{
+	int ret;
+
+	ret = lzorle1x_1_compress(cc->rbuf, cc->rlen, cc->cbuf->cdata,
+					&cc->clen, cc->private);
+	if (ret != LZO_E_OK) {
+		printk_ratelimited("%sF2FS-fs (%s): lzo-rle compress failed, ret:%d\n",
+				KERN_ERR, F2FS_I_SB(cc->inode)->sb->s_id, ret);
+		return -EIO;
+	}
+	return 0;
+}
+
+static const struct f2fs_compress_ops f2fs_lzorle_ops = {
+	.init_compress_ctx	= lzo_init_compress_ctx,
+	.destroy_compress_ctx	= lzo_destroy_compress_ctx,
+	.compress_pages		= lzorle_compress_pages,
+	.decompress_pages	= lzo_decompress_pages,
+};
+#endif
+#endif
+
 static const struct f2fs_compress_ops *f2fs_cops[COMPRESS_MAX] = {
 #ifdef CONFIG_F2FS_FS_LZO
 	&f2fs_lzo_ops,
@@ -467,6 +492,11 @@ static const struct f2fs_compress_ops *f2fs_cops[COMPRESS_MAX] = {
 #else
 	NULL,
 #endif
+#if defined(CONFIG_F2FS_FS_LZO) && defined(CONFIG_F2FS_FS_LZORLE)
+	&f2fs_lzorle_ops,
+#else
+	NULL,
+#endif
 };
 
 bool f2fs_is_compress_backend_ready(struct inode *inode)
@@ -476,17 +506,47 @@ bool f2fs_is_compress_backend_ready(struct inode *inode)
 	return f2fs_cops[F2FS_I(inode)->i_compress_algorithm];
 }
 
-static struct page *f2fs_grab_page(void)
+static mempool_t *compress_page_pool = NULL;
+static int num_compress_pages = 512;
+module_param(num_compress_pages, uint, 0444);
+MODULE_PARM_DESC(num_compress_pages,
+		"Number of intermediate compress pages to preallocate");
+
+int f2fs_init_compress_mempool(void)
+{
+	compress_page_pool = mempool_create_page_pool(num_compress_pages, 0);
+	if (!compress_page_pool)
+		return -ENOMEM;
+
+	return 0;
+}
+
+void f2fs_destroy_compress_mempool(void)
+{
+	mempool_destroy(compress_page_pool);
+}
+
+static struct page *f2fs_compress_alloc_page(void)
 {
 	struct page *page;
 
-	page = alloc_page(GFP_NOFS);
-	if (!page)
-		return NULL;
+	page = mempool_alloc(compress_page_pool, GFP_NOFS);
 	lock_page(page);
+
 	return page;
 }
 
+static void f2fs_compress_free_page(struct page *page)
+{
+	if (!page)
+		return;
+	set_page_private(page, (unsigned long)NULL);
+	ClearPagePrivate(page);
+	page->mapping = NULL;
+	unlock_page(page);
+	mempool_free(page, compress_page_pool);
+}
+
 static int f2fs_compress_pages(struct compress_ctx *cc)
 {
 	struct f2fs_sb_info *sbi = F2FS_I_SB(cc->inode);
@@ -516,7 +576,7 @@ static int f2fs_compress_pages(struct compress_ctx *cc)
 	}
 
 	for (i = 0; i < cc->nr_cpages; i++) {
-		cc->cpages[i] = f2fs_grab_page();
+		cc->cpages[i] = f2fs_compress_alloc_page();
 		if (!cc->cpages[i]) {
 			ret = -ENOMEM;
 			goto out_free_cpages;
@@ -561,7 +621,7 @@ static int f2fs_compress_pages(struct compress_ctx *cc)
 	vunmap(cc->rbuf);
 
 	for (i = nr_cpages; i < cc->nr_cpages; i++) {
-		f2fs_put_compressed_page(cc->cpages[i]);
+		f2fs_compress_free_page(cc->cpages[i]);
 		cc->cpages[i] = NULL;
 	}
 
@@ -581,7 +641,7 @@ static int f2fs_compress_pages(struct compress_ctx *cc)
 out_free_cpages:
 	for (i = 0; i < cc->nr_cpages; i++) {
 		if (cc->cpages[i])
-			f2fs_put_compressed_page(cc->cpages[i]);
+			f2fs_compress_free_page(cc->cpages[i]);
 	}
 	kfree(cc->cpages);
 	cc->cpages = NULL;
@@ -788,6 +848,8 @@ static bool cluster_may_compress(struct compress_ctx *cc)
 		return false;
 	if (!f2fs_cluster_is_full(cc))
 		return false;
+	if (unlikely(f2fs_cp_error(F2FS_I_SB(cc->inode))))
+		return false;
 	return __cluster_may_compress(cc);
 }
 
@@ -879,7 +941,7 @@ static int prepare_compress_overwrite(struct compress_ctx *cc,
 
 		if (!PageUptodate(page)) {
 			f2fs_unlock_rpages(cc, i + 1);
-			f2fs_put_rpages_mapping(cc, mapping, start_idx,
+			f2fs_put_rpages_mapping(mapping, start_idx,
 					cc->cluster_size);
 			f2fs_destroy_compress_ctx(cc);
 			goto retry;
@@ -914,7 +976,7 @@ static int prepare_compress_overwrite(struct compress_ctx *cc,
 unlock_pages:
 	f2fs_unlock_rpages(cc, i);
 release_pages:
-	f2fs_put_rpages_mapping(cc, mapping, start_idx, i);
+	f2fs_put_rpages_mapping(mapping, start_idx, i);
 	f2fs_destroy_compress_ctx(cc);
 	return ret;
 }
@@ -954,6 +1016,55 @@ bool f2fs_compress_write_end(struct inode *inode, void *fsdata,
 	return first_index;
 }
 
+int f2fs_truncate_partial_cluster(struct inode *inode, u64 from, bool lock)
+{
+	void *fsdata = NULL;
+	struct page *pagep;
+	int log_cluster_size = F2FS_I(inode)->i_log_cluster_size;
+	pgoff_t start_idx = from >> (PAGE_SHIFT + log_cluster_size) <<
+							log_cluster_size;
+	int err;
+
+	err = f2fs_is_compressed_cluster(inode, start_idx);
+	if (err < 0)
+		return err;
+
+	/* truncate normal cluster */
+	if (!err)
+		return f2fs_do_truncate_blocks(inode, from, lock);
+
+	/* truncate compressed cluster */
+	err = f2fs_prepare_compress_overwrite(inode, &pagep,
+						start_idx, &fsdata);
+
+	/* should not be a normal cluster */
+	f2fs_bug_on(F2FS_I_SB(inode), err == 0);
+
+	if (err <= 0)
+		return err;
+
+	if (err > 0) {
+		struct page **rpages = fsdata;
+		int cluster_size = F2FS_I(inode)->i_cluster_size;
+		int i;
+
+		for (i = cluster_size - 1; i >= 0; i--) {
+			loff_t start = rpages[i]->index << PAGE_SHIFT;
+
+			if (from <= start) {
+				zero_user_segment(rpages[i], 0, PAGE_SIZE);
+			} else {
+				zero_user_segment(rpages[i], from - start,
+								PAGE_SIZE);
+				break;
+			}
+		}
+
+		f2fs_compress_write_end(inode, fsdata, start_idx, true);
+	}
+	return 0;
+}
+
 static int f2fs_write_compressed_pages(struct compress_ctx *cc,
 					int *submitted,
 					struct writeback_control *wbc,
@@ -985,7 +1096,7 @@ static int f2fs_write_compressed_pages(struct compress_ctx *cc,
 	loff_t psize;
 	int i, err;
 
-	if (!f2fs_trylock_op(sbi))
+	if (!IS_NOQUOTA(inode) && !f2fs_trylock_op(sbi))
 		return -EAGAIN;
 
 	set_new_dnode(&dn, cc->inode, NULL, NULL, 0);
@@ -1092,7 +1203,8 @@ static int f2fs_write_compressed_pages(struct compress_ctx *cc,
 		set_inode_flag(inode, FI_FIRST_BLOCK_WRITTEN);
 
 	f2fs_put_dnode(&dn);
-	f2fs_unlock_op(sbi);
+	if (!IS_NOQUOTA(inode))
+		f2fs_unlock_op(sbi);
 
 	spin_lock(&fi->i_size_lock);
 	if (fi->last_disk_size < psize)
@@ -1118,7 +1230,8 @@ static int f2fs_write_compressed_pages(struct compress_ctx *cc,
 out_put_dnode:
 	f2fs_put_dnode(&dn);
 out_unlock_op:
-	f2fs_unlock_op(sbi);
+	if (!IS_NOQUOTA(inode))
+		f2fs_unlock_op(sbi);
 	return -EAGAIN;
 }
 
@@ -1132,7 +1245,7 @@ void f2fs_compress_write_end_io(struct bio *bio, struct page *page)
 	if (unlikely(bio->bi_status))
 		mapping_set_error(cic->inode->i_mapping, -EIO);
 
-	f2fs_put_compressed_page(page);
+	f2fs_compress_free_page(page);
 
 	dec_page_count(sbi, F2FS_WB_DATA);
 
@@ -1293,7 +1406,7 @@ struct decompress_io_ctx *f2fs_alloc_dic(struct compress_ctx *cc)
 	for (i = 0; i < dic->nr_cpages; i++) {
 		struct page *page;
 
-		page = f2fs_grab_page();
+		page = f2fs_compress_alloc_page();
 		if (!page)
 			goto out_free;
 
@@ -1313,7 +1426,7 @@ struct decompress_io_ctx *f2fs_alloc_dic(struct compress_ctx *cc)
 			continue;
 		}
 
-		dic->tpages[i] = f2fs_grab_page();
+		dic->tpages[i] = f2fs_compress_alloc_page();
 		if (!dic->tpages[i])
 			goto out_free;
 	}
@@ -1335,8 +1448,7 @@ void f2fs_free_dic(struct decompress_io_ctx *dic)
 				continue;
 			if (!dic->tpages[i])
 				continue;
-			unlock_page(dic->tpages[i]);
-			put_page(dic->tpages[i]);
+			f2fs_compress_free_page(dic->tpages[i]);
 		}
 		kfree(dic->tpages);
 	}
@@ -1345,7 +1457,7 @@ void f2fs_free_dic(struct decompress_io_ctx *dic)
 		for (i = 0; i < dic->nr_cpages; i++) {
 			if (!dic->cpages[i])
 				continue;
-			f2fs_put_compressed_page(dic->cpages[i]);
+			f2fs_compress_free_page(dic->cpages[i]);
 		}
 		kfree(dic->cpages);
 	}
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 072fb19..326c638 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -115,7 +115,8 @@ static enum count_type __read_io_type(struct page *page)
 /* postprocessing steps for read bios */
 enum bio_post_read_step {
 	STEP_DECRYPT,
-	STEP_DECOMPRESS,
+	STEP_DECOMPRESS_NOWQ,		/* handle normal cluster data inplace */
+	STEP_DECOMPRESS,		/* handle compressed cluster data in workqueue */
 	STEP_VERITY,
 };
 
@@ -514,6 +515,34 @@ void f2fs_submit_bio(struct f2fs_sb_info *sbi,
 	__submit_bio(sbi, bio, type);
 }
 
+static void __attach_io_flag(struct f2fs_io_info *fio)
+{
+	struct f2fs_sb_info *sbi = fio->sbi;
+	unsigned int temp_mask = (1 << NR_TEMP_TYPE) - 1;
+	unsigned int io_flag, fua_flag, meta_flag;
+
+	if (fio->type == DATA)
+		io_flag = sbi->data_io_flag;
+	else if (fio->type == NODE)
+		io_flag = sbi->node_io_flag;
+	else
+		return;
+
+	fua_flag = io_flag & temp_mask;
+	meta_flag = (io_flag >> NR_TEMP_TYPE) & temp_mask;
+
+	/*
+	 * data/node io flag bits per temp:
+	 *      REQ_META     |      REQ_FUA      |
+	 *    5 |    4 |   3 |    2 |    1 |   0 |
+	 * Cold | Warm | Hot | Cold | Warm | Hot |
+	 */
+	if ((1 << fio->temp) & meta_flag)
+		fio->op_flags |= REQ_META;
+	if ((1 << fio->temp) & fua_flag)
+		fio->op_flags |= REQ_FUA;
+}
+
 static void __submit_merged_bio(struct f2fs_bio_info *io)
 {
 	struct f2fs_io_info *fio = &io->fio;
@@ -521,6 +550,7 @@ static void __submit_merged_bio(struct f2fs_bio_info *io)
 	if (!io->bio)
 		return;
 
+	__attach_io_flag(fio);
 	bio_set_op_attrs(io->bio, fio->op, fio->op_flags);
 
 	if (is_read_io(fio->op))
@@ -662,6 +692,7 @@ int f2fs_submit_page_bio(struct f2fs_io_info *fio)
 	if (fio->io_wbc && !is_read_io(fio->op))
 		wbc_account_cgroup_owner(fio->io_wbc, page, PAGE_SIZE);
 
+	__attach_io_flag(fio);
 	bio_set_op_attrs(bio, fio->op, fio->op_flags);
 
 	inc_page_count(fio->sbi, is_read_io(fio->op) ?
@@ -848,6 +879,7 @@ int f2fs_merge_page_bio(struct f2fs_io_info *fio)
 alloc_new:
 	if (!bio) {
 		bio = __bio_alloc(fio, BIO_MAX_PAGES);
+		__attach_io_flag(fio);
 		bio_set_op_attrs(bio, fio->op, fio->op_flags);
 
 		add_bio_entry(fio->sbi, bio, page, fio->temp);
@@ -968,7 +1000,7 @@ static struct bio *f2fs_grab_read_bio(struct inode *inode, block_t blkaddr,
 	if (f2fs_encrypted_file(inode))
 		post_read_steps |= 1 << STEP_DECRYPT;
 	if (f2fs_compressed_file(inode))
-		post_read_steps |= 1 << STEP_DECOMPRESS;
+		post_read_steps |= 1 << STEP_DECOMPRESS_NOWQ;
 	if (f2fs_need_verity(inode, first_idx))
 		post_read_steps |= 1 << STEP_VERITY;
 
@@ -1011,6 +1043,7 @@ static int f2fs_submit_page_read(struct inode *inode, struct page *page,
 	}
 	ClearPageError(page);
 	inc_page_count(sbi, F2FS_RD_DATA);
+	f2fs_update_iostat(sbi, FS_DATA_READ_IO, F2FS_BLKSIZE);
 	__submit_bio(sbi, bio, DATA);
 	return 0;
 }
@@ -1809,6 +1842,25 @@ static int f2fs_xattr_fiemap(struct inode *inode,
 	return (err < 0 ? err : 0);
 }
 
+static loff_t max_inode_blocks(struct inode *inode)
+{
+	loff_t result = ADDRS_PER_INODE(inode);
+	loff_t leaf_count = ADDRS_PER_BLOCK(inode);
+
+	/* two direct node blocks */
+	result += (leaf_count * 2);
+
+	/* two indirect node blocks */
+	leaf_count *= NIDS_PER_BLOCK;
+	result += (leaf_count * 2);
+
+	/* one double indirect node block */
+	leaf_count *= NIDS_PER_BLOCK;
+	result += leaf_count;
+
+	return result;
+}
+
 int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
 		u64 start, u64 len)
 {
@@ -1818,6 +1870,8 @@ int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
 	u64 logical = 0, phys = 0, size = 0;
 	u32 flags = 0;
 	int ret = 0;
+	bool compr_cluster = false;
+	unsigned int cluster_size = F2FS_I(inode)->i_cluster_size;
 
 	if (fieinfo->fi_flags & FIEMAP_FLAG_CACHE) {
 		ret = f2fs_precache_extents(inode);
@@ -1852,6 +1906,9 @@ int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
 	memset(&map_bh, 0, sizeof(struct buffer_head));
 	map_bh.b_size = len;
 
+	if (compr_cluster)
+		map_bh.b_size = blk_to_logical(inode, cluster_size - 1);
+
 	ret = get_data_block(inode, start_blk, &map_bh, 0,
 					F2FS_GET_BLOCK_FIEMAP, &next_pgofs);
 	if (ret)
@@ -1862,7 +1919,7 @@ int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
 		start_blk = next_pgofs;
 
 		if (blk_to_logical(inode, start_blk) < blk_to_logical(inode,
-					F2FS_I_SB(inode)->max_file_blocks))
+						max_inode_blocks(inode)))
 			goto prep_next;
 
 		flags |= FIEMAP_EXTENT_LAST;
@@ -1874,11 +1931,38 @@ int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
 
 		ret = fiemap_fill_next_extent(fieinfo, logical,
 				phys, size, flags);
+		if (ret)
+			goto out;
+		size = 0;
 	}
 
-	if (start_blk > last_blk || ret)
+	if (start_blk > last_blk)
 		goto out;
 
+	if (compr_cluster) {
+		compr_cluster = false;
+
+
+		logical = blk_to_logical(inode, start_blk - 1);
+		phys = blk_to_logical(inode, map_bh.b_blocknr);
+		size = blk_to_logical(inode, cluster_size);
+
+		flags |= FIEMAP_EXTENT_ENCODED;
+
+		start_blk += cluster_size - 1;
+
+		if (start_blk > last_blk)
+			goto out;
+
+		goto prep_next;
+	}
+
+	if (map_bh.b_blocknr == COMPRESS_ADDR) {
+		compr_cluster = true;
+		start_blk++;
+		goto prep_next;
+	}
+
 	logical = blk_to_logical(inode, start_blk);
 	phys = blk_to_logical(inode, map_bh.b_blocknr);
 	size = map_bh.b_size;
@@ -2016,6 +2100,7 @@ static int f2fs_read_single_page(struct inode *inode, struct page *page,
 		goto submit_and_realloc;
 
 	inc_page_count(F2FS_I_SB(inode), F2FS_RD_DATA);
+	f2fs_update_iostat(F2FS_I_SB(inode), FS_DATA_READ_IO, F2FS_BLKSIZE);
 	ClearPageError(page);
 	*last_block_in_bio = block_nr;
 	goto out;
@@ -2114,6 +2199,7 @@ int f2fs_read_multi_pages(struct compress_ctx *cc, struct bio **bio_ret,
 	for (i = 0; i < dic->nr_cpages; i++) {
 		struct page *page = dic->cpages[i];
 		block_t blkaddr;
+		struct bio_post_read_ctx *ctx;
 
 		blkaddr = data_blkaddr(dn.inode, dn.node_page,
 						dn.ofs_in_node + i + 1);
@@ -2131,16 +2217,16 @@ int f2fs_read_multi_pages(struct compress_ctx *cc, struct bio **bio_ret,
 					page->index, for_write);
 			if (IS_ERR(bio)) {
 				ret = PTR_ERR(bio);
-				bio = NULL;
 				dic->failed = true;
 				if (refcount_sub_and_test(dic->nr_cpages - i,
-							&dic->ref))
+							&dic->ref)) {
 					f2fs_decompress_end_io(dic->rpages,
 							cc->cluster_size, true,
 							false);
-				f2fs_free_dic(dic);
+					f2fs_free_dic(dic);
+				}
 				f2fs_put_dnode(&dn);
-				*bio_ret = bio;
+				*bio_ret = NULL;
 				return ret;
 			}
 		}
@@ -2150,7 +2236,14 @@ int f2fs_read_multi_pages(struct compress_ctx *cc, struct bio **bio_ret,
 		if (bio_add_page(bio, page, blocksize, 0) < blocksize)
 			goto submit_and_realloc;
 
+		/* tag STEP_DECOMPRESS to handle IO in wq */
+		ctx = bio->bi_private;
+		if (!(ctx->enabled_steps & (1 << STEP_DECOMPRESS)))
+			ctx->enabled_steps |= 1 << STEP_DECOMPRESS;
+
 		inc_page_count(sbi, F2FS_RD_DATA);
+		f2fs_update_iostat(sbi, FS_DATA_READ_IO, F2FS_BLKSIZE);
+		f2fs_update_iostat(sbi, FS_CDATA_READ_IO, F2FS_BLKSIZE);
 		ClearPageError(page);
 		*last_block_in_bio = blkaddr;
 	}
@@ -2624,8 +2717,8 @@ int f2fs_write_single_data_page(struct page *page, int *submitted,
 			f2fs_available_free_memory(sbi, BASE_CHECK))))
 		goto redirty_out;
 
-	/* Dentry blocks are controlled by checkpoint */
-	if (S_ISDIR(inode->i_mode)) {
+	/* Dentry/quota blocks are controlled by checkpoint */
+	if (S_ISDIR(inode->i_mode) || IS_NOQUOTA(inode)) {
 		fio.need_lock = LOCK_DONE;
 		err = f2fs_do_write_data_page(&fio);
 		goto done;
@@ -2767,7 +2860,6 @@ static int f2fs_write_cache_pages(struct address_space *mapping,
 	pgoff_t index;
 	pgoff_t end;		/* Inclusive */
 	pgoff_t done_index;
-	int cycled;
 	int range_whole = 0;
 	xa_mark_t tag;
 	int nwritten = 0;
@@ -2785,17 +2877,12 @@ static int f2fs_write_cache_pages(struct address_space *mapping,
 	if (wbc->range_cyclic) {
 		writeback_index = mapping->writeback_index; /* prev offset */
 		index = writeback_index;
-		if (index == 0)
-			cycled = 1;
-		else
-			cycled = 0;
 		end = -1;
 	} else {
 		index = wbc->range_start >> PAGE_SHIFT;
 		end = wbc->range_end >> PAGE_SHIFT;
 		if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX)
 			range_whole = 1;
-		cycled = 1; /* ignore range_cyclic tests */
 	}
 	if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
 		tag = PAGECACHE_TAG_TOWRITE;
@@ -2960,12 +3047,13 @@ static int f2fs_write_cache_pages(struct address_space *mapping,
 		}
 	}
 #endif
-	if ((!cycled && !done) || retry) {
-		cycled = 1;
+	if (retry) {
 		index = 0;
-		end = writeback_index - 1;
+		end = -1;
 		goto retry;
 	}
+	if (wbc->range_cyclic && !done)
+		done_index = 0;
 	if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0))
 		mapping->writeback_index = done_index;
 
@@ -3494,6 +3582,9 @@ static ssize_t f2fs_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
 		} else if (err < 0) {
 			f2fs_write_failed(mapping, offset + count);
 		}
+	} else {
+		if (err > 0)
+			f2fs_update_iostat(sbi, APP_DIRECT_READ_IO, err);
 	}
 
 out:
@@ -3577,6 +3668,37 @@ static int f2fs_set_data_page_dirty(struct page *page)
 	return 0;
 }
 
+
+static sector_t f2fs_bmap_compress(struct inode *inode, sector_t block)
+{
+#ifdef CONFIG_F2FS_FS_COMPRESSION
+	struct dnode_of_data dn;
+	sector_t start_idx, blknr = 0;
+	int ret;
+
+	start_idx = round_down(block, F2FS_I(inode)->i_cluster_size);
+
+	set_new_dnode(&dn, inode, NULL, NULL, 0);
+	ret = f2fs_get_dnode_of_data(&dn, start_idx, LOOKUP_NODE);
+	if (ret)
+		return 0;
+
+	if (dn.data_blkaddr != COMPRESS_ADDR) {
+		dn.ofs_in_node += block - start_idx;
+		blknr = f2fs_data_blkaddr(&dn);
+		if (!__is_valid_data_blkaddr(blknr))
+			blknr = 0;
+	}
+
+	f2fs_put_dnode(&dn);
+
+	return blknr;
+#else
+	return -EOPNOTSUPP;
+#endif
+}
+
+
 static sector_t f2fs_bmap(struct address_space *mapping, sector_t block)
 {
 	struct inode *inode = mapping->host;
@@ -3588,6 +3710,9 @@ static sector_t f2fs_bmap(struct address_space *mapping, sector_t block)
 	if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY))
 		filemap_write_and_wait(mapping);
 
+	if (f2fs_compressed_file(inode))
+		return f2fs_bmap_compress(inode, block);
+
 	return generic_block_bmap(mapping, block, get_data_block_bmap);
 }
 
diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c
index 44bfc46..d359767 100644
--- a/fs/f2fs/dir.c
+++ b/fs/f2fs/dir.c
@@ -70,6 +70,111 @@ unsigned char f2fs_get_de_type(struct f2fs_dir_entry *de)
 	return DT_UNKNOWN;
 }
 
+/* If @dir is casefolded, initialize @fname->cf_name from @fname->usr_fname. */
+int f2fs_init_casefolded_name(const struct inode *dir,
+			      struct f2fs_filename *fname)
+{
+#ifdef CONFIG_UNICODE
+	struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
+
+	if (IS_CASEFOLDED(dir)) {
+		fname->cf_name.name = f2fs_kmalloc(sbi, F2FS_NAME_LEN,
+						   GFP_NOFS);
+		if (!fname->cf_name.name)
+			return -ENOMEM;
+		fname->cf_name.len = utf8_casefold(sbi->s_encoding,
+						   fname->usr_fname,
+						   fname->cf_name.name,
+						   F2FS_NAME_LEN);
+		if ((int)fname->cf_name.len <= 0) {
+			kfree(fname->cf_name.name);
+			fname->cf_name.name = NULL;
+			if (f2fs_has_strict_mode(sbi))
+				return -EINVAL;
+			/* fall back to treating name as opaque byte sequence */
+		}
+	}
+#endif
+	return 0;
+}
+
+static int __f2fs_setup_filename(const struct inode *dir,
+				 const struct fscrypt_name *crypt_name,
+				 struct f2fs_filename *fname)
+{
+	int err;
+
+	memset(fname, 0, sizeof(*fname));
+
+	fname->usr_fname = crypt_name->usr_fname;
+	fname->disk_name = crypt_name->disk_name;
+#ifdef CONFIG_FS_ENCRYPTION
+	fname->crypto_buf = crypt_name->crypto_buf;
+#endif
+	if (crypt_name->is_ciphertext_name) {
+		/* hash was decoded from the no-key name */
+		fname->hash = cpu_to_le32(crypt_name->hash);
+	} else {
+		err = f2fs_init_casefolded_name(dir, fname);
+		if (err) {
+			f2fs_free_filename(fname);
+			return err;
+		}
+		f2fs_hash_filename(dir, fname);
+	}
+	return 0;
+}
+
+/*
+ * Prepare to search for @iname in @dir.  This is similar to
+ * fscrypt_setup_filename(), but this also handles computing the casefolded name
+ * and the f2fs dirhash if needed, then packing all the information about this
+ * filename up into a 'struct f2fs_filename'.
+ */
+int f2fs_setup_filename(struct inode *dir, const struct qstr *iname,
+			int lookup, struct f2fs_filename *fname)
+{
+	struct fscrypt_name crypt_name;
+	int err;
+
+	err = fscrypt_setup_filename(dir, iname, lookup, &crypt_name);
+	if (err)
+		return err;
+
+	return __f2fs_setup_filename(dir, &crypt_name, fname);
+}
+
+/*
+ * Prepare to look up @dentry in @dir.  This is similar to
+ * fscrypt_prepare_lookup(), but this also handles computing the casefolded name
+ * and the f2fs dirhash if needed, then packing all the information about this
+ * filename up into a 'struct f2fs_filename'.
+ */
+int f2fs_prepare_lookup(struct inode *dir, struct dentry *dentry,
+			struct f2fs_filename *fname)
+{
+	struct fscrypt_name crypt_name;
+	int err;
+
+	err = fscrypt_prepare_lookup(dir, dentry, &crypt_name);
+	if (err)
+		return err;
+
+	return __f2fs_setup_filename(dir, &crypt_name, fname);
+}
+
+void f2fs_free_filename(struct f2fs_filename *fname)
+{
+#ifdef CONFIG_FS_ENCRYPTION
+	kfree(fname->crypto_buf.name);
+	fname->crypto_buf.name = NULL;
+#endif
+#ifdef CONFIG_UNICODE
+	kfree(fname->cf_name.name);
+	fname->cf_name.name = NULL;
+#endif
+}
+
 static unsigned long dir_block_index(unsigned int level,
 				int dir_level, unsigned int idx)
 {
@@ -84,8 +189,7 @@ static unsigned long dir_block_index(unsigned int level,
 
 static struct f2fs_dir_entry *find_in_block(struct inode *dir,
 				struct page *dentry_page,
-				struct fscrypt_name *fname,
-				f2fs_hash_t namehash,
+				const struct f2fs_filename *fname,
 				int *max_slots,
 				struct page **res_page)
 {
@@ -96,7 +200,7 @@ static struct f2fs_dir_entry *find_in_block(struct inode *dir,
 	dentry_blk = (struct f2fs_dentry_block *)page_address(dentry_page);
 
 	make_dentry_ptr_block(dir, &d, dentry_blk);
-	de = f2fs_find_target_dentry(fname, namehash, max_slots, &d);
+	de = f2fs_find_target_dentry(&d, fname, max_slots);
 	if (de)
 		*res_page = dentry_page;
 
@@ -107,112 +211,57 @@ static struct f2fs_dir_entry *find_in_block(struct inode *dir,
 /*
  * Test whether a case-insensitive directory entry matches the filename
  * being searched for.
- *
- * Returns: 0 if the directory entry matches, more than 0 if it
- * doesn't match or less than zero on error.
  */
-int f2fs_ci_compare(const struct inode *parent, const struct qstr *name,
-				const struct qstr *entry, bool quick)
+static bool f2fs_match_ci_name(const struct inode *dir, const struct qstr *name,
+			       const u8 *de_name, u32 de_name_len)
 {
-	const struct f2fs_sb_info *sbi = F2FS_SB(parent->i_sb);
+	const struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
 	const struct unicode_map *um = sbi->s_encoding;
-	int ret;
+	struct qstr entry = QSTR_INIT(de_name, de_name_len);
+	int res;
 
-	if (quick)
-		ret = utf8_strncasecmp_folded(um, name, entry);
-	else
-		ret = utf8_strncasecmp(um, name, entry);
-
-	if (ret < 0) {
-		/* Handle invalid character sequence as either an error
-		 * or as an opaque byte sequence.
+	res = utf8_strncasecmp_folded(um, name, &entry);
+	if (res < 0) {
+		/*
+		 * In strict mode, ignore invalid names.  In non-strict mode,
+		 * fall back to treating them as opaque byte sequences.
 		 */
-		if (f2fs_has_strict_mode(sbi))
-			return -EINVAL;
-
-		if (name->len != entry->len)
-			return 1;
-
-		return !!memcmp(name->name, entry->name, name->len);
+		if (f2fs_has_strict_mode(sbi) || name->len != entry.len)
+			return false;
+		return !memcmp(name->name, entry.name, name->len);
 	}
-
-	return ret;
+	return res == 0;
 }
+#endif /* CONFIG_UNICODE */
 
-static void f2fs_fname_setup_ci_filename(struct inode *dir,
-					const struct qstr *iname,
-					struct fscrypt_str *cf_name)
+static inline bool f2fs_match_name(const struct inode *dir,
+				   const struct f2fs_filename *fname,
+				   const u8 *de_name, u32 de_name_len)
 {
-	struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
-
-	if (!IS_CASEFOLDED(dir)) {
-		cf_name->name = NULL;
-		return;
-	}
-
-	cf_name->name = f2fs_kmalloc(sbi, F2FS_NAME_LEN, GFP_NOFS);
-	if (!cf_name->name)
-		return;
-
-	cf_name->len = utf8_casefold(sbi->s_encoding,
-					iname, cf_name->name,
-					F2FS_NAME_LEN);
-	if ((int)cf_name->len <= 0) {
-		kvfree(cf_name->name);
-		cf_name->name = NULL;
-	}
-}
-#endif
-
-static inline bool f2fs_match_name(struct f2fs_dentry_ptr *d,
-					struct f2fs_dir_entry *de,
-					struct fscrypt_name *fname,
-					struct fscrypt_str *cf_str,
-					unsigned long bit_pos,
-					f2fs_hash_t namehash)
-{
-#ifdef CONFIG_UNICODE
-	struct inode *parent = d->inode;
-	struct f2fs_sb_info *sbi = F2FS_I_SB(parent);
-	struct qstr entry;
-#endif
-
-	if (de->hash_code != namehash)
-		return false;
+	struct fscrypt_name f;
 
 #ifdef CONFIG_UNICODE
-	entry.name = d->filename[bit_pos];
-	entry.len = de->name_len;
+	if (fname->cf_name.name) {
+		struct qstr cf = FSTR_TO_QSTR(&fname->cf_name);
 
-	if (sbi->s_encoding && IS_CASEFOLDED(parent)) {
-		if (cf_str->name) {
-			struct qstr cf = {.name = cf_str->name,
-					  .len = cf_str->len};
-			return !f2fs_ci_compare(parent, &cf, &entry, true);
-		}
-		return !f2fs_ci_compare(parent, fname->usr_fname, &entry,
-					false);
+		return f2fs_match_ci_name(dir, &cf, de_name, de_name_len);
 	}
 #endif
-	if (fscrypt_match_name(fname, d->filename[bit_pos],
-				le16_to_cpu(de->name_len)))
-		return true;
-	return false;
+	f.usr_fname = fname->usr_fname;
+	f.disk_name = fname->disk_name;
+#ifdef CONFIG_FS_ENCRYPTION
+	f.crypto_buf = fname->crypto_buf;
+#endif
+	return fscrypt_match_name(&f, de_name, de_name_len);
 }
 
-struct f2fs_dir_entry *f2fs_find_target_dentry(struct fscrypt_name *fname,
-			f2fs_hash_t namehash, int *max_slots,
-			struct f2fs_dentry_ptr *d)
+struct f2fs_dir_entry *f2fs_find_target_dentry(const struct f2fs_dentry_ptr *d,
+			const struct f2fs_filename *fname, int *max_slots)
 {
 	struct f2fs_dir_entry *de;
-	struct fscrypt_str cf_str = { .name = NULL, .len = 0 };
 	unsigned long bit_pos = 0;
 	int max_len = 0;
 
-#ifdef CONFIG_UNICODE
-	f2fs_fname_setup_ci_filename(d->inode, fname->usr_fname, &cf_str);
-#endif
-
 	if (max_slots)
 		*max_slots = 0;
 	while (bit_pos < d->max) {
@@ -229,7 +278,9 @@ struct f2fs_dir_entry *f2fs_find_target_dentry(struct fscrypt_name *fname,
 			continue;
 		}
 
-		if (f2fs_match_name(d, de, fname, &cf_str, bit_pos, namehash))
+		if (de->hash_code == fname->hash &&
+		    f2fs_match_name(d->inode, fname, d->filename[bit_pos],
+				    le16_to_cpu(de->name_len)))
 			goto found;
 
 		if (max_slots && max_len > *max_slots)
@@ -243,33 +294,27 @@ struct f2fs_dir_entry *f2fs_find_target_dentry(struct fscrypt_name *fname,
 found:
 	if (max_slots && max_len > *max_slots)
 		*max_slots = max_len;
-
-#ifdef CONFIG_UNICODE
-	kvfree(cf_str.name);
-#endif
 	return de;
 }
 
 static struct f2fs_dir_entry *find_in_level(struct inode *dir,
 					unsigned int level,
-					struct fscrypt_name *fname,
+					const struct f2fs_filename *fname,
 					struct page **res_page)
 {
-	struct qstr name = FSTR_TO_QSTR(&fname->disk_name);
-	int s = GET_DENTRY_SLOTS(name.len);
+	int s = GET_DENTRY_SLOTS(fname->disk_name.len);
 	unsigned int nbucket, nblock;
 	unsigned int bidx, end_block;
 	struct page *dentry_page;
 	struct f2fs_dir_entry *de = NULL;
 	bool room = false;
 	int max_slots;
-	f2fs_hash_t namehash = f2fs_dentry_hash(dir, &name, fname);
 
 	nbucket = dir_buckets(level, F2FS_I(dir)->i_dir_level);
 	nblock = bucket_blocks(level);
 
 	bidx = dir_block_index(level, F2FS_I(dir)->i_dir_level,
-					le32_to_cpu(namehash) % nbucket);
+			       le32_to_cpu(fname->hash) % nbucket);
 	end_block = bidx + nblock;
 
 	for (; bidx < end_block; bidx++) {
@@ -285,8 +330,8 @@ static struct f2fs_dir_entry *find_in_level(struct inode *dir,
 			}
 		}
 
-		de = find_in_block(dir, dentry_page, fname, namehash,
-							&max_slots, res_page);
+		de = find_in_block(dir, dentry_page, fname, &max_slots,
+				   res_page);
 		if (de)
 			break;
 
@@ -295,8 +340,8 @@ static struct f2fs_dir_entry *find_in_level(struct inode *dir,
 		f2fs_put_page(dentry_page, 0);
 	}
 
-	if (!de && room && F2FS_I(dir)->chash != namehash) {
-		F2FS_I(dir)->chash = namehash;
+	if (!de && room && F2FS_I(dir)->chash != fname->hash) {
+		F2FS_I(dir)->chash = fname->hash;
 		F2FS_I(dir)->clevel = level;
 	}
 
@@ -304,7 +349,8 @@ static struct f2fs_dir_entry *find_in_level(struct inode *dir,
 }
 
 struct f2fs_dir_entry *__f2fs_find_entry(struct inode *dir,
-			struct fscrypt_name *fname, struct page **res_page)
+					 const struct f2fs_filename *fname,
+					 struct page **res_page)
 {
 	unsigned long npages = dir_blocks(dir);
 	struct f2fs_dir_entry *de = NULL;
@@ -353,18 +399,10 @@ struct f2fs_dir_entry *f2fs_find_entry(struct inode *dir,
 			const struct qstr *child, struct page **res_page)
 {
 	struct f2fs_dir_entry *de = NULL;
-	struct fscrypt_name fname;
+	struct f2fs_filename fname;
 	int err;
 
-#ifdef CONFIG_UNICODE
-	if (f2fs_has_strict_mode(F2FS_I_SB(dir)) && IS_CASEFOLDED(dir) &&
-			utf8_validate(F2FS_I_SB(dir)->s_encoding, child)) {
-		*res_page = ERR_PTR(-EINVAL);
-		return NULL;
-	}
-#endif
-
-	err = fscrypt_setup_filename(dir, child, 1, &fname);
+	err = f2fs_setup_filename(dir, child, 1, &fname);
 	if (err) {
 		if (err == -ENOENT)
 			*res_page = NULL;
@@ -375,7 +413,7 @@ struct f2fs_dir_entry *f2fs_find_entry(struct inode *dir,
 
 	de = __f2fs_find_entry(dir, &fname, res_page);
 
-	fscrypt_free_filename(&fname);
+	f2fs_free_filename(&fname);
 	return de;
 }
 
@@ -416,7 +454,8 @@ void f2fs_set_link(struct inode *dir, struct f2fs_dir_entry *de,
 	f2fs_put_page(page, 1);
 }
 
-static void init_dent_inode(const struct qstr *name, struct page *ipage)
+static void init_dent_inode(const struct f2fs_filename *fname,
+			    struct page *ipage)
 {
 	struct f2fs_inode *ri;
 
@@ -424,16 +463,16 @@ static void init_dent_inode(const struct qstr *name, struct page *ipage)
 
 	/* copy name info. to this inode page */
 	ri = F2FS_INODE(ipage);
-	ri->i_namelen = cpu_to_le32(name->len);
-	memcpy(ri->i_name, name->name, name->len);
+	ri->i_namelen = cpu_to_le32(fname->disk_name.len);
+	memcpy(ri->i_name, fname->disk_name.name, fname->disk_name.len);
 	set_page_dirty(ipage);
 }
 
 void f2fs_do_make_empty_dir(struct inode *inode, struct inode *parent,
 					struct f2fs_dentry_ptr *d)
 {
-	struct qstr dot = QSTR_INIT(".", 1);
-	struct qstr dotdot = QSTR_INIT("..", 2);
+	struct fscrypt_str dot = FSTR_INIT(".", 1);
+	struct fscrypt_str dotdot = FSTR_INIT("..", 2);
 
 	/* update dirent of "." */
 	f2fs_update_dentry(inode->i_ino, inode->i_mode, d, &dot, 0, 0);
@@ -467,8 +506,7 @@ static int make_empty_dir(struct inode *inode,
 }
 
 struct page *f2fs_init_inode_metadata(struct inode *inode, struct inode *dir,
-			const struct qstr *new_name, const struct qstr *orig_name,
-			struct page *dpage)
+			const struct f2fs_filename *fname, struct page *dpage)
 {
 	struct page *page;
 	int err;
@@ -493,7 +531,8 @@ struct page *f2fs_init_inode_metadata(struct inode *inode, struct inode *dir,
 		if (err)
 			goto put_error;
 
-		err = f2fs_init_security(inode, dir, orig_name, page);
+		err = f2fs_init_security(inode, dir,
+					 fname ? fname->usr_fname : NULL, page);
 		if (err)
 			goto put_error;
 
@@ -508,8 +547,8 @@ struct page *f2fs_init_inode_metadata(struct inode *inode, struct inode *dir,
 			return page;
 	}
 
-	if (new_name) {
-		init_dent_inode(new_name, page);
+	if (fname) {
+		init_dent_inode(fname, page);
 		if (IS_ENCRYPTED(dir))
 			file_set_enc_name(inode);
 	}
@@ -577,11 +616,11 @@ int f2fs_room_for_filename(const void *bitmap, int slots, int max_slots)
 }
 
 bool f2fs_has_enough_room(struct inode *dir, struct page *ipage,
-					struct fscrypt_name *fname)
+			  const struct f2fs_filename *fname)
 {
 	struct f2fs_dentry_ptr d;
 	unsigned int bit_pos;
-	int slots = GET_DENTRY_SLOTS(fname_len(fname));
+	int slots = GET_DENTRY_SLOTS(fname->disk_name.len);
 
 	make_dentry_ptr_inline(dir, &d, inline_data_addr(dir, ipage));
 
@@ -591,8 +630,8 @@ bool f2fs_has_enough_room(struct inode *dir, struct page *ipage,
 }
 
 void f2fs_update_dentry(nid_t ino, umode_t mode, struct f2fs_dentry_ptr *d,
-				const struct qstr *name, f2fs_hash_t name_hash,
-				unsigned int bit_pos)
+			const struct fscrypt_str *name, f2fs_hash_t name_hash,
+			unsigned int bit_pos)
 {
 	struct f2fs_dir_entry *de;
 	int slots = GET_DENTRY_SLOTS(name->len);
@@ -612,15 +651,13 @@ void f2fs_update_dentry(nid_t ino, umode_t mode, struct f2fs_dentry_ptr *d,
 	}
 }
 
-int f2fs_add_regular_entry(struct inode *dir, const struct qstr *new_name,
-				const struct qstr *orig_name,
-				struct inode *inode, nid_t ino, umode_t mode)
+int f2fs_add_regular_entry(struct inode *dir, const struct f2fs_filename *fname,
+			   struct inode *inode, nid_t ino, umode_t mode)
 {
 	unsigned int bit_pos;
 	unsigned int level;
 	unsigned int current_depth;
 	unsigned long bidx, block;
-	f2fs_hash_t dentry_hash;
 	unsigned int nbucket, nblock;
 	struct page *dentry_page = NULL;
 	struct f2fs_dentry_block *dentry_blk = NULL;
@@ -629,11 +666,10 @@ int f2fs_add_regular_entry(struct inode *dir, const struct qstr *new_name,
 	int slots, err = 0;
 
 	level = 0;
-	slots = GET_DENTRY_SLOTS(new_name->len);
-	dentry_hash = f2fs_dentry_hash(dir, new_name, NULL);
+	slots = GET_DENTRY_SLOTS(fname->disk_name.len);
 
 	current_depth = F2FS_I(dir)->i_current_depth;
-	if (F2FS_I(dir)->chash == dentry_hash) {
+	if (F2FS_I(dir)->chash == fname->hash) {
 		level = F2FS_I(dir)->clevel;
 		F2FS_I(dir)->chash = 0;
 	}
@@ -655,7 +691,7 @@ int f2fs_add_regular_entry(struct inode *dir, const struct qstr *new_name,
 	nblock = bucket_blocks(level);
 
 	bidx = dir_block_index(level, F2FS_I(dir)->i_dir_level,
-				(le32_to_cpu(dentry_hash) % nbucket));
+				(le32_to_cpu(fname->hash) % nbucket));
 
 	for (block = bidx; block <= (bidx + nblock - 1); block++) {
 		dentry_page = f2fs_get_new_data_page(dir, NULL, block, true);
@@ -679,8 +715,7 @@ int f2fs_add_regular_entry(struct inode *dir, const struct qstr *new_name,
 
 	if (inode) {
 		down_write(&F2FS_I(inode)->i_sem);
-		page = f2fs_init_inode_metadata(inode, dir, new_name,
-						orig_name, NULL);
+		page = f2fs_init_inode_metadata(inode, dir, fname, NULL);
 		if (IS_ERR(page)) {
 			err = PTR_ERR(page);
 			goto fail;
@@ -688,7 +723,8 @@ int f2fs_add_regular_entry(struct inode *dir, const struct qstr *new_name,
 	}
 
 	make_dentry_ptr_block(NULL, &d, dentry_blk);
-	f2fs_update_dentry(ino, mode, &d, new_name, dentry_hash, bit_pos);
+	f2fs_update_dentry(ino, mode, &d, &fname->disk_name, fname->hash,
+			   bit_pos);
 
 	set_page_dirty(dentry_page);
 
@@ -712,21 +748,15 @@ int f2fs_add_regular_entry(struct inode *dir, const struct qstr *new_name,
 	return err;
 }
 
-int f2fs_add_dentry(struct inode *dir, struct fscrypt_name *fname,
-				struct inode *inode, nid_t ino, umode_t mode)
+int f2fs_add_dentry(struct inode *dir, const struct f2fs_filename *fname,
+		    struct inode *inode, nid_t ino, umode_t mode)
 {
-	struct qstr new_name;
 	int err = -EAGAIN;
 
-	new_name.name = fname_name(fname);
-	new_name.len = fname_len(fname);
-
 	if (f2fs_has_inline_dentry(dir))
-		err = f2fs_add_inline_entry(dir, &new_name, fname->usr_fname,
-							inode, ino, mode);
+		err = f2fs_add_inline_entry(dir, fname, inode, ino, mode);
 	if (err == -EAGAIN)
-		err = f2fs_add_regular_entry(dir, &new_name, fname->usr_fname,
-							inode, ino, mode);
+		err = f2fs_add_regular_entry(dir, fname, inode, ino, mode);
 
 	f2fs_update_time(F2FS_I_SB(dir), REQ_TIME);
 	return err;
@@ -739,12 +769,12 @@ int f2fs_add_dentry(struct inode *dir, struct fscrypt_name *fname,
 int f2fs_do_add_link(struct inode *dir, const struct qstr *name,
 				struct inode *inode, nid_t ino, umode_t mode)
 {
-	struct fscrypt_name fname;
+	struct f2fs_filename fname;
 	struct page *page = NULL;
 	struct f2fs_dir_entry *de = NULL;
 	int err;
 
-	err = fscrypt_setup_filename(dir, name, 0, &fname);
+	err = f2fs_setup_filename(dir, name, 0, &fname);
 	if (err)
 		return err;
 
@@ -767,7 +797,7 @@ int f2fs_do_add_link(struct inode *dir, const struct qstr *name,
 	} else {
 		err = f2fs_add_dentry(dir, &fname, inode, ino, mode);
 	}
-	fscrypt_free_filename(&fname);
+	f2fs_free_filename(&fname);
 	return err;
 }
 
@@ -777,7 +807,7 @@ int f2fs_do_tmpfile(struct inode *inode, struct inode *dir)
 	int err = 0;
 
 	down_write(&F2FS_I(inode)->i_sem);
-	page = f2fs_init_inode_metadata(inode, dir, NULL, NULL, NULL);
+	page = f2fs_init_inode_metadata(inode, dir, NULL, NULL);
 	if (IS_ERR(page)) {
 		err = PTR_ERR(page);
 		goto fail;
@@ -1080,17 +1110,41 @@ const struct file_operations f2fs_dir_operations = {
 static int f2fs_d_compare(const struct dentry *dentry, unsigned int len,
 			  const char *str, const struct qstr *name)
 {
-	struct qstr qstr = {.name = str, .len = len };
 	const struct dentry *parent = READ_ONCE(dentry->d_parent);
-	const struct inode *inode = READ_ONCE(parent->d_inode);
+	const struct inode *dir = READ_ONCE(parent->d_inode);
+	const struct f2fs_sb_info *sbi = F2FS_SB(dentry->d_sb);
+	struct qstr entry = QSTR_INIT(str, len);
+	char strbuf[DNAME_INLINE_LEN];
+	int res;
 
-	if (!inode || !IS_CASEFOLDED(inode)) {
-		if (len != name->len)
-			return -1;
-		return memcmp(str, name->name, len);
+	if (!dir || !IS_CASEFOLDED(dir))
+		goto fallback;
+
+	/*
+	 * If the dentry name is stored in-line, then it may be concurrently
+	 * modified by a rename.  If this happens, the VFS will eventually retry
+	 * the lookup, so it doesn't matter what ->d_compare() returns.
+	 * However, it's unsafe to call utf8_strncasecmp() with an unstable
+	 * string.  Therefore, we have to copy the name into a temporary buffer.
+	 */
+	if (len <= DNAME_INLINE_LEN - 1) {
+		memcpy(strbuf, str, len);
+		strbuf[len] = 0;
+		entry.name = strbuf;
+		/* prevent compiler from optimizing out the temporary buffer */
+		barrier();
 	}
 
-	return f2fs_ci_compare(inode, name, &qstr, false);
+	res = utf8_strncasecmp(sbi->s_encoding, name, &entry);
+	if (res >= 0)
+		return res;
+
+	if (f2fs_has_strict_mode(sbi))
+		return -EINVAL;
+fallback:
+	if (len != name->len)
+		return 1;
+	return !!memcmp(str, name->name, len);
 }
 
 static int f2fs_d_hash(const struct dentry *dentry, struct qstr *str)
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 5c0149d..b35a50f 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: GPL-2.0
+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  * fs/f2fs/f2fs.h
  *
@@ -139,6 +139,7 @@ struct f2fs_mount_info {
 	int fs_mode;			/* fs mode: LFS or ADAPTIVE */
 	int bggc_mode;			/* bggc mode: off, on or sync */
 	struct fscrypt_dummy_context dummy_enc_ctx; /* test dummy encryption */
+	block_t unusable_cap_perc;	/* percentage for cap */
 	block_t unusable_cap;		/* Amount of space allowed to be
 					 * unusable when disabling checkpoint
 					 */
@@ -194,6 +195,7 @@ enum {
 #define	CP_DISCARD	0x00000010
 #define CP_TRIMMED	0x00000020
 #define CP_PAUSE	0x00000040
+#define CP_RESIZE 	0x00000080
 
 #define MAX_DISCARD_BLOCKS(sbi)		BLKS_PER_SEC(sbi)
 #define DEF_MAX_DISCARD_REQUEST		8	/* issue 8 discards per round */
@@ -428,6 +430,10 @@ static inline bool __has_cursum_space(struct f2fs_journal *journal,
 #define F2FS_IOC_PRECACHE_EXTENTS	_IO(F2FS_IOCTL_MAGIC, 15)
 #define F2FS_IOC_RESIZE_FS		_IOW(F2FS_IOCTL_MAGIC, 16, __u64)
 #define F2FS_IOC_GET_COMPRESS_BLOCKS	_IOR(F2FS_IOCTL_MAGIC, 17, __u64)
+#define F2FS_IOC_RELEASE_COMPRESS_BLOCKS				\
+					_IOR(F2FS_IOCTL_MAGIC, 18, __u64)
+#define F2FS_IOC_RESERVE_COMPRESS_BLOCKS				\
+					_IOR(F2FS_IOCTL_MAGIC, 19, __u64)
 
 #define F2FS_IOC_GET_VOLUME_NAME	FS_IOC_GETFSLABEL
 #define F2FS_IOC_SET_VOLUME_NAME	FS_IOC_SETFSLABEL
@@ -506,6 +512,42 @@ static inline int get_inline_xattr_addrs(struct inode *inode);
  * For INODE and NODE manager
  */
 /* for directory operations */
+
+struct f2fs_filename {
+	/*
+	 * The filename the user specified.  This is NULL for some
+	 * filesystem-internal operations, e.g. converting an inline directory
+	 * to a non-inline one, or roll-forward recovering an encrypted dentry.
+	 */
+	const struct qstr *usr_fname;
+
+	/*
+	 * The on-disk filename.  For encrypted directories, this is encrypted.
+	 * This may be NULL for lookups in an encrypted dir without the key.
+	 */
+	struct fscrypt_str disk_name;
+
+	/* The dirhash of this filename */
+	f2fs_hash_t hash;
+
+#ifdef CONFIG_FS_ENCRYPTION
+	/*
+	 * For lookups in encrypted directories: either the buffer backing
+	 * disk_name, or a buffer that holds the decoded no-key name.
+	 */
+	struct fscrypt_str crypto_buf;
+#endif
+#ifdef CONFIG_UNICODE
+	/*
+	 * For casefolded directories: the casefolded name, but it's left NULL
+	 * if the original name is not valid Unicode or if the filesystem is
+	 * doing an internal operation where usr_fname is also NULL.  In these
+	 * cases we fall back to treating the name as an opaque byte sequence.
+	 */
+	struct fscrypt_str cf_name;
+#endif
+};
+
 struct f2fs_dentry_ptr {
 	struct inode *inode;
 	void *bitmap;
@@ -1088,8 +1130,9 @@ enum cp_reason_type {
 };
 
 enum iostat_type {
-	APP_DIRECT_IO,			/* app direct IOs */
-	APP_BUFFERED_IO,		/* app buffered IOs */
+	/* WRITE IO */
+	APP_DIRECT_IO,			/* app direct write IOs */
+	APP_BUFFERED_IO,		/* app buffered write IOs */
 	APP_WRITE_IO,			/* app write IOs */
 	APP_MAPPED_IO,			/* app mapped IOs */
 	FS_DATA_IO,			/* data IOs from kworker/fsync/reclaimer */
@@ -1100,6 +1143,19 @@ enum iostat_type {
 	FS_CP_DATA_IO,			/* data IOs from checkpoint */
 	FS_CP_NODE_IO,			/* node IOs from checkpoint */
 	FS_CP_META_IO,			/* meta IOs from checkpoint */
+
+	/* READ IO */
+	APP_DIRECT_READ_IO,		/* app direct read IOs */
+	APP_BUFFERED_READ_IO,		/* app buffered read IOs */
+	APP_READ_IO,			/* app read IOs */
+	APP_MAPPED_READ_IO,		/* app mapped read IOs */
+	FS_DATA_READ_IO,		/* data read IOs */
+	FS_GDATA_READ_IO,		/* data read IOs from background gc */
+	FS_CDATA_READ_IO,		/* compressed data read IOs */
+	FS_NODE_READ_IO,		/* node read IOs */
+	FS_META_READ_IO,		/* meta read IOs */
+
+	/* other */
 	FS_DISCARD,			/* discard */
 	NR_IO_TYPE,
 };
@@ -1269,6 +1325,7 @@ enum compress_algorithm_type {
 	COMPRESS_LZO,
 	COMPRESS_LZ4,
 	COMPRESS_ZSTD,
+	COMPRESS_LZORLE,
 	COMPRESS_MAX,
 };
 
@@ -1418,7 +1475,6 @@ struct f2fs_sb_info {
 	unsigned int segs_per_sec;		/* segments per section */
 	unsigned int secs_per_zone;		/* sections per zone */
 	unsigned int total_sections;		/* total section count */
-	struct mutex resize_mutex;		/* for resize exclusion */
 	unsigned int total_node_count;		/* total node block count */
 	unsigned int total_valid_node_count;	/* valid node block count */
 	loff_t max_file_blocks;			/* max block index of file */
@@ -1504,8 +1560,15 @@ struct f2fs_sb_info {
 
 	/* For app/fs IO statistics */
 	spinlock_t iostat_lock;
-	unsigned long long write_iostat[NR_IO_TYPE];
+	unsigned long long rw_iostat[NR_IO_TYPE];
+	unsigned long long prev_rw_iostat[NR_IO_TYPE];
 	bool iostat_enable;
+	unsigned long iostat_next_period;
+	unsigned int iostat_period_ms;
+
+	/* to attach REQ_META|REQ_FUA flags */
+	unsigned int data_io_flag;
+	unsigned int node_io_flag;
 
 	/* For sysfs suppport */
 	struct kobject s_kobj;
@@ -2902,12 +2965,12 @@ static inline bool f2fs_cp_error(struct f2fs_sb_info *sbi)
 	return is_set_ckpt_flags(sbi, CP_ERROR_FLAG);
 }
 
-static inline bool is_dot_dotdot(const struct qstr *str)
+static inline bool is_dot_dotdot(const u8 *name, size_t len)
 {
-	if (str->len == 1 && str->name[0] == '.')
+	if (len == 1 && name[0] == '.')
 		return true;
 
-	if (str->len == 2 && str->name[0] == '.' && str->name[1] == '.')
+	if (len == 2 && name[0] == '.' && name[1] == '.')
 		return true;
 
 	return false;
@@ -2935,18 +2998,12 @@ static inline bool f2fs_may_extent_tree(struct inode *inode)
 static inline void *f2fs_kmalloc(struct f2fs_sb_info *sbi,
 					size_t size, gfp_t flags)
 {
-	void *ret;
-
 	if (time_to_inject(sbi, FAULT_KMALLOC)) {
 		f2fs_show_injection_info(sbi, FAULT_KMALLOC);
 		return NULL;
 	}
 
-	ret = kmalloc(size, flags);
-	if (ret)
-		return ret;
-
-	return kvmalloc(size, flags);
+	return kmalloc(size, flags);
 }
 
 static inline void *f2fs_kzalloc(struct f2fs_sb_info *sbi,
@@ -2996,29 +3053,45 @@ static inline int get_inline_xattr_addrs(struct inode *inode)
 		sizeof((f2fs_inode)->field))			\
 		<= (F2FS_OLD_ATTRIBUTE_SIZE + (extra_isize)))	\
 
+#define DEFAULT_IOSTAT_PERIOD_MS	3000
+#define MIN_IOSTAT_PERIOD_MS		100
+/* maximum period of iostat tracing is 1 day */
+#define MAX_IOSTAT_PERIOD_MS		8640000
+
 static inline void f2fs_reset_iostat(struct f2fs_sb_info *sbi)
 {
 	int i;
 
 	spin_lock(&sbi->iostat_lock);
-	for (i = 0; i < NR_IO_TYPE; i++)
-		sbi->write_iostat[i] = 0;
+	for (i = 0; i < NR_IO_TYPE; i++) {
+		sbi->rw_iostat[i] = 0;
+		sbi->prev_rw_iostat[i] = 0;
+	}
 	spin_unlock(&sbi->iostat_lock);
 }
 
+extern void f2fs_record_iostat(struct f2fs_sb_info *sbi);
+
 static inline void f2fs_update_iostat(struct f2fs_sb_info *sbi,
 			enum iostat_type type, unsigned long long io_bytes)
 {
 	if (!sbi->iostat_enable)
 		return;
 	spin_lock(&sbi->iostat_lock);
-	sbi->write_iostat[type] += io_bytes;
+	sbi->rw_iostat[type] += io_bytes;
 
 	if (type == APP_WRITE_IO || type == APP_DIRECT_IO)
-		sbi->write_iostat[APP_BUFFERED_IO] =
-			sbi->write_iostat[APP_WRITE_IO] -
-			sbi->write_iostat[APP_DIRECT_IO];
+		sbi->rw_iostat[APP_BUFFERED_IO] =
+			sbi->rw_iostat[APP_WRITE_IO] -
+			sbi->rw_iostat[APP_DIRECT_IO];
+
+	if (type == APP_READ_IO || type == APP_DIRECT_READ_IO)
+		sbi->rw_iostat[APP_BUFFERED_READ_IO] =
+			sbi->rw_iostat[APP_READ_IO] -
+			sbi->rw_iostat[APP_DIRECT_READ_IO];
 	spin_unlock(&sbi->iostat_lock);
+
+	f2fs_record_iostat(sbi);
 }
 
 #define __is_large_section(sbi)		((sbi)->segs_per_sec > 1)
@@ -3064,6 +3137,7 @@ static inline void f2fs_clear_page_private(struct page *page)
  */
 int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
 void f2fs_truncate_data_blocks(struct dnode_of_data *dn);
+int f2fs_do_truncate_blocks(struct inode *inode, u64 from, bool lock);
 int f2fs_truncate_blocks(struct inode *inode, u64 from, bool lock);
 int f2fs_truncate(struct inode *inode);
 int f2fs_getattr(const struct path *path, struct kstat *stat,
@@ -3099,31 +3173,32 @@ int f2fs_update_extension_list(struct f2fs_sb_info *sbi, const char *name,
 							bool hot, bool set);
 struct dentry *f2fs_get_parent(struct dentry *child);
 
-extern int f2fs_ci_compare(const struct inode *parent,
-			   const struct qstr *name,
-			   const struct qstr *entry,
-			   bool quick);
-
 /*
  * dir.c
  */
 unsigned char f2fs_get_de_type(struct f2fs_dir_entry *de);
-struct f2fs_dir_entry *f2fs_find_target_dentry(struct fscrypt_name *fname,
-			f2fs_hash_t namehash, int *max_slots,
-			struct f2fs_dentry_ptr *d);
+int f2fs_init_casefolded_name(const struct inode *dir,
+			      struct f2fs_filename *fname);
+int f2fs_setup_filename(struct inode *dir, const struct qstr *iname,
+			int lookup, struct f2fs_filename *fname);
+int f2fs_prepare_lookup(struct inode *dir, struct dentry *dentry,
+			struct f2fs_filename *fname);
+void f2fs_free_filename(struct f2fs_filename *fname);
+struct f2fs_dir_entry *f2fs_find_target_dentry(const struct f2fs_dentry_ptr *d,
+			const struct f2fs_filename *fname, int *max_slots);
 int f2fs_fill_dentries(struct dir_context *ctx, struct f2fs_dentry_ptr *d,
 			unsigned int start_pos, struct fscrypt_str *fstr);
 void f2fs_do_make_empty_dir(struct inode *inode, struct inode *parent,
 			struct f2fs_dentry_ptr *d);
 struct page *f2fs_init_inode_metadata(struct inode *inode, struct inode *dir,
-			const struct qstr *new_name,
-			const struct qstr *orig_name, struct page *dpage);
+			const struct f2fs_filename *fname, struct page *dpage);
 void f2fs_update_parent_metadata(struct inode *dir, struct inode *inode,
 			unsigned int current_depth);
 int f2fs_room_for_filename(const void *bitmap, int slots, int max_slots);
 void f2fs_drop_nlink(struct inode *dir, struct inode *inode);
 struct f2fs_dir_entry *__f2fs_find_entry(struct inode *dir,
-			struct fscrypt_name *fname, struct page **res_page);
+					 const struct f2fs_filename *fname,
+					 struct page **res_page);
 struct f2fs_dir_entry *f2fs_find_entry(struct inode *dir,
 			const struct qstr *child, struct page **res_page);
 struct f2fs_dir_entry *f2fs_parent_dir(struct inode *dir, struct page **p);
@@ -3132,14 +3207,13 @@ ino_t f2fs_inode_by_name(struct inode *dir, const struct qstr *qstr,
 void f2fs_set_link(struct inode *dir, struct f2fs_dir_entry *de,
 			struct page *page, struct inode *inode);
 bool f2fs_has_enough_room(struct inode *dir, struct page *ipage,
-			struct fscrypt_name *fname);
+			  const struct f2fs_filename *fname);
 void f2fs_update_dentry(nid_t ino, umode_t mode, struct f2fs_dentry_ptr *d,
-			const struct qstr *name, f2fs_hash_t name_hash,
+			const struct fscrypt_str *name, f2fs_hash_t name_hash,
 			unsigned int bit_pos);
-int f2fs_add_regular_entry(struct inode *dir, const struct qstr *new_name,
-			const struct qstr *orig_name,
+int f2fs_add_regular_entry(struct inode *dir, const struct f2fs_filename *fname,
 			struct inode *inode, nid_t ino, umode_t mode);
-int f2fs_add_dentry(struct inode *dir, struct fscrypt_name *fname,
+int f2fs_add_dentry(struct inode *dir, const struct f2fs_filename *fname,
 			struct inode *inode, nid_t ino, umode_t mode);
 int f2fs_do_add_link(struct inode *dir, const struct qstr *name,
 			struct inode *inode, nid_t ino, umode_t mode);
@@ -3169,8 +3243,7 @@ int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi);
 /*
  * hash.c
  */
-f2fs_hash_t f2fs_dentry_hash(const struct inode *dir,
-		const struct qstr *name_info, struct fscrypt_name *fname);
+void f2fs_hash_filename(const struct inode *dir, struct f2fs_filename *fname);
 
 /*
  * node.c
@@ -3202,6 +3275,7 @@ void f2fs_ra_node_page(struct f2fs_sb_info *sbi, nid_t nid);
 struct page *f2fs_get_node_page(struct f2fs_sb_info *sbi, pgoff_t nid);
 struct page *f2fs_get_node_page_ra(struct page *parent, int start);
 int f2fs_move_node_page(struct page *node_page, int gc_type);
+int f2fs_flush_inline_data(struct f2fs_sb_info *sbi);
 int f2fs_fsync_node_pages(struct f2fs_sb_info *sbi, struct inode *inode,
 			struct writeback_control *wbc, bool atomic,
 			unsigned int *seq_id);
@@ -3645,7 +3719,7 @@ static inline int f2fs_build_stats(struct f2fs_sb_info *sbi) { return 0; }
 static inline void f2fs_destroy_stats(struct f2fs_sb_info *sbi) { }
 static inline void __init f2fs_create_root_stats(void) { }
 static inline void f2fs_destroy_root_stats(void) { }
-static inline void update_sit_info(struct f2fs_sb_info *sbi) {}
+static inline void f2fs_update_sit_info(struct f2fs_sb_info *sbi) {}
 #endif
 
 extern const struct file_operations f2fs_dir_operations;
@@ -3678,11 +3752,11 @@ int f2fs_try_convert_inline_dir(struct inode *dir, struct dentry *dentry);
 int f2fs_write_inline_data(struct inode *inode, struct page *page);
 bool f2fs_recover_inline_data(struct inode *inode, struct page *npage);
 struct f2fs_dir_entry *f2fs_find_in_inline_dir(struct inode *dir,
-			struct fscrypt_name *fname, struct page **res_page);
+					const struct f2fs_filename *fname,
+					struct page **res_page);
 int f2fs_make_empty_inline_dir(struct inode *inode, struct inode *parent,
 			struct page *ipage);
-int f2fs_add_inline_entry(struct inode *dir, const struct qstr *new_name,
-			const struct qstr *orig_name,
+int f2fs_add_inline_entry(struct inode *dir, const struct f2fs_filename *fname,
 			struct inode *inode, nid_t ino, umode_t mode);
 void f2fs_delete_inline_entry(struct f2fs_dir_entry *dentry,
 				struct page *page, struct inode *dir,
@@ -3781,8 +3855,11 @@ int f2fs_prepare_compress_overwrite(struct inode *inode,
 			struct page **pagep, pgoff_t index, void **fsdata);
 bool f2fs_compress_write_end(struct inode *inode, void *fsdata,
 					pgoff_t index, unsigned copied);
+int f2fs_truncate_partial_cluster(struct inode *inode, u64 from, bool lock);
 void f2fs_compress_write_end_io(struct bio *bio, struct page *page);
 bool f2fs_is_compress_backend_ready(struct inode *inode);
+int f2fs_init_compress_mempool(void);
+void f2fs_destroy_compress_mempool(void);
 void f2fs_decompress_pages(struct bio *bio, struct page *page, bool verity);
 bool f2fs_cluster_is_empty(struct compress_ctx *cc);
 bool f2fs_cluster_can_merge_page(struct compress_ctx *cc, pgoff_t index);
@@ -3816,6 +3893,8 @@ static inline struct page *f2fs_compress_control_page(struct page *page)
 	WARN_ON_ONCE(1);
 	return ERR_PTR(-EINVAL);
 }
+static inline int f2fs_init_compress_mempool(void) { return 0; }
+static inline void f2fs_destroy_compress_mempool(void) { }
 #endif
 
 static inline void set_compress_context(struct inode *inode)
@@ -3962,6 +4041,10 @@ static inline void f2fs_i_compr_blocks_update(struct inode *inode,
 {
 	int diff = F2FS_I(inode)->i_cluster_size - blocks;
 
+	/* don't update i_compr_blocks if saved blocks were released */
+	if (!add && !F2FS_I(inode)->i_compr_blocks)
+		return;
+
 	if (add) {
 		F2FS_I(inode)->i_compr_blocks += diff;
 		stat_add_compr_blocks(inode, diff);
@@ -4003,8 +4086,6 @@ static inline bool f2fs_force_buffered_io(struct inode *inode,
 		return true;
 	if (f2fs_is_multi_device(sbi))
 		return true;
-	if (f2fs_compressed_file(inode))
-		return true;
 	/*
 	 * for blkzoned device, fallback direct IO to buffered IO, so
 	 * all IOs can be serialized by log-structured write.
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 6ab8f62..3268f8d 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -40,6 +40,10 @@ static vm_fault_t f2fs_filemap_fault(struct vm_fault *vmf)
 	ret = filemap_fault(vmf);
 	up_read(&F2FS_I(inode)->i_mmap_sem);
 
+	if (!ret)
+		f2fs_update_iostat(F2FS_I_SB(inode), APP_MAPPED_READ_IO,
+							F2FS_BLKSIZE);
+
 	trace_f2fs_filemap_fault(inode, vmf->pgoff, (unsigned long)ret);
 
 	return ret;
@@ -165,9 +169,11 @@ static int get_parent_ino(struct inode *inode, nid_t *pino)
 {
 	struct dentry *dentry;
 
-	inode = igrab(inode);
-	dentry = d_find_any_alias(inode);
-	iput(inode);
+	/*
+	 * Make sure to get the non-deleted alias.  The alias associated with
+	 * the open file descriptor being fsync()'ed may be deleted already.
+	 */
+	dentry = d_find_alias(inode);
 	if (!dentry)
 		return 0;
 
@@ -557,6 +563,7 @@ void f2fs_truncate_data_blocks_range(struct dnode_of_data *dn, int count)
 	bool compressed_cluster = false;
 	int cluster_index = 0, valid_blocks = 0;
 	int cluster_size = F2FS_I(dn->inode)->i_cluster_size;
+	bool released = !F2FS_I(dn->inode)->i_compr_blocks;
 
 	if (IS_INODE(dn->node_page) && f2fs_has_extra_attr(dn->inode))
 		base = get_extra_isize(dn->inode);
@@ -595,7 +602,9 @@ void f2fs_truncate_data_blocks_range(struct dnode_of_data *dn, int count)
 			clear_inode_flag(dn->inode, FI_FIRST_BLOCK_WRITTEN);
 
 		f2fs_invalidate_blocks(sbi, blkaddr);
-		nr_free++;
+
+		if (!released || blkaddr != COMPRESS_ADDR)
+			nr_free++;
 	}
 
 	if (compressed_cluster)
@@ -643,9 +652,6 @@ static int truncate_partial_data_page(struct inode *inode, u64 from,
 		return 0;
 	}
 
-	if (f2fs_compressed_file(inode))
-		return 0;
-
 	page = f2fs_get_lock_data_page(inode, index, true);
 	if (IS_ERR(page))
 		return PTR_ERR(page) == -ENOENT ? 0 : PTR_ERR(page);
@@ -661,7 +667,7 @@ static int truncate_partial_data_page(struct inode *inode, u64 from,
 	return 0;
 }
 
-static int do_truncate_blocks(struct inode *inode, u64 from, bool lock)
+int f2fs_do_truncate_blocks(struct inode *inode, u64 from, bool lock)
 {
 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 	struct dnode_of_data dn;
@@ -729,23 +735,28 @@ static int do_truncate_blocks(struct inode *inode, u64 from, bool lock)
 int f2fs_truncate_blocks(struct inode *inode, u64 from, bool lock)
 {
 	u64 free_from = from;
+	int err;
 
+#ifdef CONFIG_F2FS_FS_COMPRESSION
 	/*
 	 * for compressed file, only support cluster size
 	 * aligned truncation.
 	 */
-	if (f2fs_compressed_file(inode)) {
-		size_t cluster_shift = PAGE_SHIFT +
-					F2FS_I(inode)->i_log_cluster_size;
-		size_t cluster_mask = (1 << cluster_shift) - 1;
+	if (f2fs_compressed_file(inode))
+		free_from = round_up(from,
+				F2FS_I(inode)->i_cluster_size << PAGE_SHIFT);
+#endif
 
-		free_from = from >> cluster_shift;
-		if (from & cluster_mask)
-			free_from++;
-		free_from <<= cluster_shift;
-	}
+	err = f2fs_do_truncate_blocks(inode, free_from, lock);
+	if (err)
+		return err;
 
-	return do_truncate_blocks(inode, free_from, lock);
+#ifdef CONFIG_F2FS_FS_COMPRESSION
+	if (from != free_from)
+		err = f2fs_truncate_partial_cluster(inode, from, lock);
+#endif
+
+	return err;
 }
 
 int f2fs_truncate(struct inode *inode)
@@ -968,9 +979,7 @@ const struct inode_operations f2fs_file_inode_operations = {
 	.setattr	= f2fs_setattr,
 	.get_acl	= f2fs_get_acl,
 	.set_acl	= f2fs_set_acl,
-#ifdef CONFIG_F2FS_FS_XATTR
 	.listxattr	= f2fs_listxattr,
-#endif
 	.fiemap		= f2fs_fiemap,
 };
 
@@ -1649,7 +1658,11 @@ static int expand_inode_data(struct inode *inode, loff_t offset,
 
 		down_write(&sbi->pin_sem);
 		map.m_seg_type = CURSEG_COLD_DATA_PINNED;
+
+		f2fs_lock_op(sbi);
 		f2fs_allocate_new_segments(sbi, CURSEG_COLD_DATA);
+		f2fs_unlock_op(sbi);
+
 		err = f2fs_map_blocks(inode, &map, 1, F2FS_GET_BLOCK_PRE_DIO);
 		up_write(&sbi->pin_sem);
 
@@ -2219,8 +2232,15 @@ static int f2fs_ioc_shutdown(struct file *filp, unsigned long arg)
 
 	if (in != F2FS_GOING_DOWN_FULLSYNC) {
 		ret = mnt_want_write_file(filp);
-		if (ret)
+		if (ret) {
+			if (ret == -EROFS) {
+				ret = 0;
+				f2fs_stop_checkpoint(sbi, false);
+				set_sbi_flag(sbi, SBI_IS_SHUTDOWN);
+				trace_f2fs_shutdown(sbi, in, ret);
+			}
 			return ret;
+		}
 	}
 
 	switch (in) {
@@ -3301,7 +3321,6 @@ static int f2fs_ioc_resize_fs(struct file *filp, unsigned long arg)
 {
 	struct f2fs_sb_info *sbi = F2FS_I_SB(file_inode(filp));
 	__u64 block_count;
-	int ret;
 
 	if (!capable(CAP_SYS_ADMIN))
 		return -EPERM;
@@ -3313,9 +3332,7 @@ static int f2fs_ioc_resize_fs(struct file *filp, unsigned long arg)
 			   sizeof(block_count)))
 		return -EFAULT;
 
-	ret = f2fs_resize_fs(sbi, block_count);
-
-	return ret;
+	return f2fs_resize_fs(sbi, block_count);
 }
 
 static int f2fs_ioc_enable_verity(struct file *filp, unsigned long arg)
@@ -3419,6 +3436,326 @@ static int f2fs_get_compress_blocks(struct file *filp, unsigned long arg)
 	return put_user(blocks, (u64 __user *)arg);
 }
 
+static int release_compress_blocks(struct dnode_of_data *dn, pgoff_t count)
+{
+	struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
+	unsigned int released_blocks = 0;
+	int cluster_size = F2FS_I(dn->inode)->i_cluster_size;
+	block_t blkaddr;
+	int i;
+
+	for (i = 0; i < count; i++) {
+		blkaddr = data_blkaddr(dn->inode, dn->node_page,
+						dn->ofs_in_node + i);
+
+		if (!__is_valid_data_blkaddr(blkaddr))
+			continue;
+		if (unlikely(!f2fs_is_valid_blkaddr(sbi, blkaddr,
+					DATA_GENERIC_ENHANCE)))
+			return -EFSCORRUPTED;
+	}
+
+	while (count) {
+		int compr_blocks = 0;
+
+		for (i = 0; i < cluster_size; i++, dn->ofs_in_node++) {
+			blkaddr = f2fs_data_blkaddr(dn);
+
+			if (i == 0) {
+				if (blkaddr == COMPRESS_ADDR)
+					continue;
+				dn->ofs_in_node += cluster_size;
+				goto next;
+			}
+
+			if (__is_valid_data_blkaddr(blkaddr))
+				compr_blocks++;
+
+			if (blkaddr != NEW_ADDR)
+				continue;
+
+			dn->data_blkaddr = NULL_ADDR;
+			f2fs_set_data_blkaddr(dn);
+		}
+
+		f2fs_i_compr_blocks_update(dn->inode, compr_blocks, false);
+		dec_valid_block_count(sbi, dn->inode,
+					cluster_size - compr_blocks);
+
+		released_blocks += cluster_size - compr_blocks;
+next:
+		count -= cluster_size;
+	}
+
+	return released_blocks;
+}
+
+static int f2fs_release_compress_blocks(struct file *filp, unsigned long arg)
+{
+	struct inode *inode = file_inode(filp);
+	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+	pgoff_t page_idx = 0, last_idx;
+	unsigned int released_blocks = 0;
+	int ret;
+	int writecount;
+
+	if (!f2fs_sb_has_compression(F2FS_I_SB(inode)))
+		return -EOPNOTSUPP;
+
+	if (!f2fs_compressed_file(inode))
+		return -EINVAL;
+
+	if (f2fs_readonly(sbi->sb))
+		return -EROFS;
+
+	ret = mnt_want_write_file(filp);
+	if (ret)
+		return ret;
+
+	f2fs_balance_fs(F2FS_I_SB(inode), true);
+
+	inode_lock(inode);
+
+	writecount = atomic_read(&inode->i_writecount);
+	if ((filp->f_mode & FMODE_WRITE && writecount != 1) || writecount) {
+		ret = -EBUSY;
+		goto out;
+	}
+
+	if (IS_IMMUTABLE(inode)) {
+		ret = -EINVAL;
+		goto out;
+	}
+
+	ret = filemap_write_and_wait_range(inode->i_mapping, 0, LLONG_MAX);
+	if (ret)
+		goto out;
+
+	if (!F2FS_I(inode)->i_compr_blocks)
+		goto out;
+
+	F2FS_I(inode)->i_flags |= F2FS_IMMUTABLE_FL;
+	f2fs_set_inode_flags(inode);
+	inode->i_ctime = current_time(inode);
+	f2fs_mark_inode_dirty_sync(inode, true);
+
+	down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
+	down_write(&F2FS_I(inode)->i_mmap_sem);
+
+	last_idx = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE);
+
+	while (page_idx < last_idx) {
+		struct dnode_of_data dn;
+		pgoff_t end_offset, count;
+
+		set_new_dnode(&dn, inode, NULL, NULL, 0);
+		ret = f2fs_get_dnode_of_data(&dn, page_idx, LOOKUP_NODE);
+		if (ret) {
+			if (ret == -ENOENT) {
+				page_idx = f2fs_get_next_page_offset(&dn,
+								page_idx);
+				ret = 0;
+				continue;
+			}
+			break;
+		}
+
+		end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
+		count = min(end_offset - dn.ofs_in_node, last_idx - page_idx);
+		count = round_up(count, F2FS_I(inode)->i_cluster_size);
+
+		ret = release_compress_blocks(&dn, count);
+
+		f2fs_put_dnode(&dn);
+
+		if (ret < 0)
+			break;
+
+		page_idx += count;
+		released_blocks += ret;
+	}
+
+	up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
+	up_write(&F2FS_I(inode)->i_mmap_sem);
+out:
+	inode_unlock(inode);
+
+	mnt_drop_write_file(filp);
+
+	if (ret >= 0) {
+		ret = put_user(released_blocks, (u64 __user *)arg);
+	} else if (released_blocks && F2FS_I(inode)->i_compr_blocks) {
+		set_sbi_flag(sbi, SBI_NEED_FSCK);
+		f2fs_warn(sbi, "%s: partial blocks were released i_ino=%lx "
+			"iblocks=%llu, released=%u, compr_blocks=%llu, "
+			"run fsck to fix.",
+			__func__, inode->i_ino, inode->i_blocks,
+			released_blocks,
+			F2FS_I(inode)->i_compr_blocks);
+	}
+
+	return ret;
+}
+
+static int reserve_compress_blocks(struct dnode_of_data *dn, pgoff_t count)
+{
+	struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
+	unsigned int reserved_blocks = 0;
+	int cluster_size = F2FS_I(dn->inode)->i_cluster_size;
+	block_t blkaddr;
+	int i;
+
+	for (i = 0; i < count; i++) {
+		blkaddr = data_blkaddr(dn->inode, dn->node_page,
+						dn->ofs_in_node + i);
+
+		if (!__is_valid_data_blkaddr(blkaddr))
+			continue;
+		if (unlikely(!f2fs_is_valid_blkaddr(sbi, blkaddr,
+					DATA_GENERIC_ENHANCE)))
+			return -EFSCORRUPTED;
+	}
+
+	while (count) {
+		int compr_blocks = 0;
+		blkcnt_t reserved;
+		int ret;
+
+		for (i = 0; i < cluster_size; i++, dn->ofs_in_node++) {
+			blkaddr = f2fs_data_blkaddr(dn);
+
+			if (i == 0) {
+				if (blkaddr == COMPRESS_ADDR)
+					continue;
+				dn->ofs_in_node += cluster_size;
+				goto next;
+			}
+
+			if (__is_valid_data_blkaddr(blkaddr)) {
+				compr_blocks++;
+				continue;
+			}
+
+			dn->data_blkaddr = NEW_ADDR;
+			f2fs_set_data_blkaddr(dn);
+		}
+
+		reserved = cluster_size - compr_blocks;
+		ret = inc_valid_block_count(sbi, dn->inode, &reserved);
+		if (ret)
+			return ret;
+
+		if (reserved != cluster_size - compr_blocks)
+			return -ENOSPC;
+
+		f2fs_i_compr_blocks_update(dn->inode, compr_blocks, true);
+
+		reserved_blocks += reserved;
+next:
+		count -= cluster_size;
+	}
+
+	return reserved_blocks;
+}
+
+static int f2fs_reserve_compress_blocks(struct file *filp, unsigned long arg)
+{
+	struct inode *inode = file_inode(filp);
+	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+	pgoff_t page_idx = 0, last_idx;
+	unsigned int reserved_blocks = 0;
+	int ret;
+
+	if (!f2fs_sb_has_compression(F2FS_I_SB(inode)))
+		return -EOPNOTSUPP;
+
+	if (!f2fs_compressed_file(inode))
+		return -EINVAL;
+
+	if (f2fs_readonly(sbi->sb))
+		return -EROFS;
+
+	ret = mnt_want_write_file(filp);
+	if (ret)
+		return ret;
+
+	if (F2FS_I(inode)->i_compr_blocks)
+		goto out;
+
+	f2fs_balance_fs(F2FS_I_SB(inode), true);
+
+	inode_lock(inode);
+
+	if (!IS_IMMUTABLE(inode)) {
+		ret = -EINVAL;
+		goto unlock_inode;
+	}
+
+	down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
+	down_write(&F2FS_I(inode)->i_mmap_sem);
+
+	last_idx = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE);
+
+	while (page_idx < last_idx) {
+		struct dnode_of_data dn;
+		pgoff_t end_offset, count;
+
+		set_new_dnode(&dn, inode, NULL, NULL, 0);
+		ret = f2fs_get_dnode_of_data(&dn, page_idx, LOOKUP_NODE);
+		if (ret) {
+			if (ret == -ENOENT) {
+				page_idx = f2fs_get_next_page_offset(&dn,
+								page_idx);
+				ret = 0;
+				continue;
+			}
+			break;
+		}
+
+		end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
+		count = min(end_offset - dn.ofs_in_node, last_idx - page_idx);
+		count = round_up(count, F2FS_I(inode)->i_cluster_size);
+
+		ret = reserve_compress_blocks(&dn, count);
+
+		f2fs_put_dnode(&dn);
+
+		if (ret < 0)
+			break;
+
+		page_idx += count;
+		reserved_blocks += ret;
+	}
+
+	up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
+	up_write(&F2FS_I(inode)->i_mmap_sem);
+
+	if (ret >= 0) {
+		F2FS_I(inode)->i_flags &= ~F2FS_IMMUTABLE_FL;
+		f2fs_set_inode_flags(inode);
+		inode->i_ctime = current_time(inode);
+		f2fs_mark_inode_dirty_sync(inode, true);
+	}
+unlock_inode:
+	inode_unlock(inode);
+out:
+	mnt_drop_write_file(filp);
+
+	if (ret >= 0) {
+		ret = put_user(reserved_blocks, (u64 __user *)arg);
+	} else if (reserved_blocks && F2FS_I(inode)->i_compr_blocks) {
+		set_sbi_flag(sbi, SBI_NEED_FSCK);
+		f2fs_warn(sbi, "%s: partial blocks were released i_ino=%lx "
+			"iblocks=%llu, reserved=%u, compr_blocks=%llu, "
+			"run fsck to fix.",
+			__func__, inode->i_ino, inode->i_blocks,
+			reserved_blocks,
+			F2FS_I(inode)->i_compr_blocks);
+	}
+
+	return ret;
+}
+
 long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 {
 	if (unlikely(f2fs_cp_error(F2FS_I_SB(file_inode(filp)))))
@@ -3501,6 +3838,10 @@ long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 		return f2fs_set_volume_name(filp, arg);
 	case F2FS_IOC_GET_COMPRESS_BLOCKS:
 		return f2fs_get_compress_blocks(filp, arg);
+	case F2FS_IOC_RELEASE_COMPRESS_BLOCKS:
+		return f2fs_release_compress_blocks(filp, arg);
+	case F2FS_IOC_RESERVE_COMPRESS_BLOCKS:
+		return f2fs_reserve_compress_blocks(filp, arg);
 	default:
 		return -ENOTTY;
 	}
@@ -3510,11 +3851,17 @@ static ssize_t f2fs_file_read_iter(struct kiocb *iocb, struct iov_iter *iter)
 {
 	struct file *file = iocb->ki_filp;
 	struct inode *inode = file_inode(file);
+	int ret;
 
 	if (!f2fs_is_compress_backend_ready(inode))
 		return -EOPNOTSUPP;
 
-	return generic_file_read_iter(iocb, iter);
+	ret = generic_file_read_iter(iocb, iter);
+
+	if (ret > 0)
+		f2fs_update_iostat(F2FS_I_SB(inode), APP_READ_IO, ret);
+
+	return ret;
 }
 
 static ssize_t f2fs_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
@@ -3662,6 +4009,8 @@ long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 	case F2FS_IOC_GET_VOLUME_NAME:
 	case F2FS_IOC_SET_VOLUME_NAME:
 	case F2FS_IOC_GET_COMPRESS_BLOCKS:
+	case F2FS_IOC_RELEASE_COMPRESS_BLOCKS:
+	case F2FS_IOC_RESERVE_COMPRESS_BLOCKS:
 		break;
 	default:
 		return -ENOIOCTLCMD;
diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index 26248c8..5b95d5a 100644
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -13,6 +13,7 @@
 #include <linux/kthread.h>
 #include <linux/delay.h>
 #include <linux/freezer.h>
+#include <linux/sched/signal.h>
 
 #include "f2fs.h"
 #include "node.h"
@@ -737,6 +738,10 @@ static int ra_data_block(struct inode *inode, pgoff_t index)
 		goto put_encrypted_page;
 	f2fs_put_page(fio.encrypted_page, 0);
 	f2fs_put_page(page, 1);
+
+	f2fs_update_iostat(sbi, FS_DATA_READ_IO, F2FS_BLKSIZE);
+	f2fs_update_iostat(sbi, FS_GDATA_READ_IO, F2FS_BLKSIZE);
+
 	return 0;
 put_encrypted_page:
 	f2fs_put_page(fio.encrypted_page, 1);
@@ -840,6 +845,10 @@ static int move_data_block(struct inode *inode, block_t bidx,
 			f2fs_put_page(mpage, 1);
 			goto up_out;
 		}
+
+		f2fs_update_iostat(fio.sbi, FS_DATA_READ_IO, F2FS_BLKSIZE);
+		f2fs_update_iostat(fio.sbi, FS_GDATA_READ_IO, F2FS_BLKSIZE);
+
 		lock_page(mpage);
 		if (unlikely(mpage->mapping != META_MAPPING(fio.sbi) ||
 						!PageUptodate(mpage))) {
@@ -1399,12 +1408,29 @@ void f2fs_build_gc_manager(struct f2fs_sb_info *sbi)
 				GET_SEGNO(sbi, FDEV(0).end_blk) + 1;
 }
 
-static int free_segment_range(struct f2fs_sb_info *sbi, unsigned int start,
-							unsigned int end)
+static int free_segment_range(struct f2fs_sb_info *sbi,
+				unsigned int secs, bool gc_only)
 {
-	int type;
-	unsigned int segno, next_inuse;
+	unsigned int segno, next_inuse, start, end;
+	struct cp_control cpc = { CP_RESIZE, 0, 0, 0 };
+	int gc_mode, gc_type;
 	int err = 0;
+	int type;
+
+	/* Force block allocation for GC */
+	MAIN_SECS(sbi) -= secs;
+	start = MAIN_SECS(sbi) * sbi->segs_per_sec;
+	end = MAIN_SEGS(sbi) - 1;
+
+	mutex_lock(&DIRTY_I(sbi)->seglist_lock);
+	for (gc_mode = 0; gc_mode < MAX_GC_POLICY; gc_mode++)
+		if (SIT_I(sbi)->last_victim[gc_mode] >= start)
+			SIT_I(sbi)->last_victim[gc_mode] = 0;
+
+	for (gc_type = BG_GC; gc_type <= FG_GC; gc_type++)
+		if (sbi->next_victim_seg[gc_type] >= start)
+			sbi->next_victim_seg[gc_type] = NULL_SEGNO;
+	mutex_unlock(&DIRTY_I(sbi)->seglist_lock);
 
 	/* Move out cursegs from the target range */
 	for (type = CURSEG_HOT_DATA; type < NR_CURSEG_TYPE; type++)
@@ -1417,18 +1443,24 @@ static int free_segment_range(struct f2fs_sb_info *sbi, unsigned int start,
 			.iroot = RADIX_TREE_INIT(gc_list.iroot, GFP_NOFS),
 		};
 
-		down_write(&sbi->gc_lock);
 		do_garbage_collect(sbi, segno, &gc_list, FG_GC);
-		up_write(&sbi->gc_lock);
 		put_gc_inode(&gc_list);
 
-		if (get_valid_blocks(sbi, segno, true))
-			return -EAGAIN;
+		if (!gc_only && get_valid_blocks(sbi, segno, true)) {
+			err = -EAGAIN;
+			goto out;
+		}
+		if (fatal_signal_pending(current)) {
+			err = -ERESTARTSYS;
+			goto out;
+		}
 	}
+	if (gc_only)
+		goto out;
 
-	err = f2fs_sync_fs(sbi->sb, 1);
+	err = f2fs_write_checkpoint(sbi, &cpc);
 	if (err)
-		return err;
+		goto out;
 
 	next_inuse = find_next_inuse(FREE_I(sbi), end + 1, start);
 	if (next_inuse <= end) {
@@ -1436,6 +1468,8 @@ static int free_segment_range(struct f2fs_sb_info *sbi, unsigned int start,
 			 next_inuse);
 		f2fs_bug_on(sbi, 1);
 	}
+out:
+	MAIN_SECS(sbi) += secs;
 	return err;
 }
 
@@ -1481,6 +1515,7 @@ static void update_fs_metadata(struct f2fs_sb_info *sbi, int secs)
 
 	SM_I(sbi)->segment_count = (int)SM_I(sbi)->segment_count + segs;
 	MAIN_SEGS(sbi) = (int)MAIN_SEGS(sbi) + segs;
+	MAIN_SECS(sbi) += secs;
 	FREE_I(sbi)->free_sections = (int)FREE_I(sbi)->free_sections + secs;
 	FREE_I(sbi)->free_segments = (int)FREE_I(sbi)->free_segments + segs;
 	F2FS_CKPT(sbi)->user_block_count = cpu_to_le64(user_block_count + blks);
@@ -1502,8 +1537,8 @@ static void update_fs_metadata(struct f2fs_sb_info *sbi, int secs)
 int f2fs_resize_fs(struct f2fs_sb_info *sbi, __u64 block_count)
 {
 	__u64 old_block_count, shrunk_blocks;
+	struct cp_control cpc = { CP_RESIZE, 0, 0, 0 };
 	unsigned int secs;
-	int gc_mode, gc_type;
 	int err = 0;
 	__u32 rem;
 
@@ -1538,10 +1573,27 @@ int f2fs_resize_fs(struct f2fs_sb_info *sbi, __u64 block_count)
 		return -EINVAL;
 	}
 
-	freeze_bdev(sbi->sb->s_bdev);
-
 	shrunk_blocks = old_block_count - block_count;
 	secs = div_u64(shrunk_blocks, BLKS_PER_SEC(sbi));
+
+	/* stop other GC */
+	if (!down_write_trylock(&sbi->gc_lock))
+		return -EAGAIN;
+
+	/* stop CP to protect MAIN_SEC in free_segment_range */
+	f2fs_lock_op(sbi);
+	err = free_segment_range(sbi, secs, true);
+	f2fs_unlock_op(sbi);
+	up_write(&sbi->gc_lock);
+	if (err)
+		return err;
+
+	set_sbi_flag(sbi, SBI_IS_RESIZEFS);
+
+	freeze_super(sbi->sb);
+	down_write(&sbi->gc_lock);
+	mutex_lock(&sbi->cp_mutex);
+
 	spin_lock(&sbi->stat_lock);
 	if (shrunk_blocks + valid_user_blocks(sbi) +
 		sbi->current_reserved_blocks + sbi->unusable_block_count +
@@ -1550,69 +1602,44 @@ int f2fs_resize_fs(struct f2fs_sb_info *sbi, __u64 block_count)
 	else
 		sbi->user_block_count -= shrunk_blocks;
 	spin_unlock(&sbi->stat_lock);
-	if (err) {
-		thaw_bdev(sbi->sb->s_bdev, sbi->sb);
-		return err;
-	}
-
-	mutex_lock(&sbi->resize_mutex);
-	set_sbi_flag(sbi, SBI_IS_RESIZEFS);
-
-	mutex_lock(&DIRTY_I(sbi)->seglist_lock);
-
-	MAIN_SECS(sbi) -= secs;
-
-	for (gc_mode = 0; gc_mode < MAX_GC_POLICY; gc_mode++)
-		if (SIT_I(sbi)->last_victim[gc_mode] >=
-					MAIN_SECS(sbi) * sbi->segs_per_sec)
-			SIT_I(sbi)->last_victim[gc_mode] = 0;
-
-	for (gc_type = BG_GC; gc_type <= FG_GC; gc_type++)
-		if (sbi->next_victim_seg[gc_type] >=
-					MAIN_SECS(sbi) * sbi->segs_per_sec)
-			sbi->next_victim_seg[gc_type] = NULL_SEGNO;
-
-	mutex_unlock(&DIRTY_I(sbi)->seglist_lock);
-
-	err = free_segment_range(sbi, MAIN_SECS(sbi) * sbi->segs_per_sec,
-			MAIN_SEGS(sbi) - 1);
 	if (err)
-		goto out;
+		goto out_err;
+
+	err = free_segment_range(sbi, secs, false);
+	if (err)
+		goto recover_out;
 
 	update_sb_metadata(sbi, -secs);
 
 	err = f2fs_commit_super(sbi, false);
 	if (err) {
 		update_sb_metadata(sbi, secs);
-		goto out;
+		goto recover_out;
 	}
 
-	mutex_lock(&sbi->cp_mutex);
 	update_fs_metadata(sbi, -secs);
 	clear_sbi_flag(sbi, SBI_IS_RESIZEFS);
 	set_sbi_flag(sbi, SBI_IS_DIRTY);
-	mutex_unlock(&sbi->cp_mutex);
 
-	err = f2fs_sync_fs(sbi->sb, 1);
+	err = f2fs_write_checkpoint(sbi, &cpc);
 	if (err) {
-		mutex_lock(&sbi->cp_mutex);
 		update_fs_metadata(sbi, secs);
-		mutex_unlock(&sbi->cp_mutex);
 		update_sb_metadata(sbi, secs);
 		f2fs_commit_super(sbi, false);
 	}
-out:
+recover_out:
 	if (err) {
 		set_sbi_flag(sbi, SBI_NEED_FSCK);
 		f2fs_err(sbi, "resize_fs failed, should run fsck to repair!");
 
-		MAIN_SECS(sbi) += secs;
 		spin_lock(&sbi->stat_lock);
 		sbi->user_block_count += shrunk_blocks;
 		spin_unlock(&sbi->stat_lock);
 	}
+out_err:
+	mutex_unlock(&sbi->cp_mutex);
+	up_write(&sbi->gc_lock);
+	thaw_super(sbi->sb);
 	clear_sbi_flag(sbi, SBI_IS_RESIZEFS);
-	mutex_unlock(&sbi->resize_mutex);
-	thaw_bdev(sbi->sb->s_bdev, sbi->sb);
 	return err;
 }
diff --git a/fs/f2fs/gc.h b/fs/f2fs/gc.h
index bbac9d3..db3c610 100644
--- a/fs/f2fs/gc.h
+++ b/fs/f2fs/gc.h
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: GPL-2.0
+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  * fs/f2fs/gc.h
  *
diff --git a/fs/f2fs/hash.c b/fs/f2fs/hash.c
index 8c4ea50..de841aa 100644
--- a/fs/f2fs/hash.c
+++ b/fs/f2fs/hash.c
@@ -67,22 +67,9 @@ static void str2hashbuf(const unsigned char *msg, size_t len,
 		*buf++ = pad;
 }
 
-static f2fs_hash_t __f2fs_dentry_hash(const struct qstr *name_info,
-				struct fscrypt_name *fname)
+static u32 TEA_hash_name(const u8 *p, size_t len)
 {
-	__u32 hash;
-	f2fs_hash_t f2fs_hash;
-	const unsigned char *p;
 	__u32 in[8], buf[4];
-	const unsigned char *name = name_info->name;
-	size_t len = name_info->len;
-
-	/* encrypted bigname case */
-	if (fname && !fname->disk_name.name)
-		return cpu_to_le32(fname->hash);
-
-	if (is_dot_dotdot(name_info))
-		return 0;
 
 	/* Initialize the default seed for the hash checksum functions */
 	buf[0] = 0x67452301;
@@ -90,7 +77,6 @@ static f2fs_hash_t __f2fs_dentry_hash(const struct qstr *name_info,
 	buf[2] = 0x98badcfe;
 	buf[3] = 0x10325476;
 
-	p = name;
 	while (1) {
 		str2hashbuf(p, len, in, 4);
 		TEA_transform(buf, in);
@@ -99,41 +85,43 @@ static f2fs_hash_t __f2fs_dentry_hash(const struct qstr *name_info,
 			break;
 		len -= 16;
 	}
-	hash = buf[0];
-	f2fs_hash = cpu_to_le32(hash & ~F2FS_HASH_COL_BIT);
-	return f2fs_hash;
+	return buf[0] & ~F2FS_HASH_COL_BIT;
 }
 
-f2fs_hash_t f2fs_dentry_hash(const struct inode *dir,
-		const struct qstr *name_info, struct fscrypt_name *fname)
+/*
+ * Compute @fname->hash.  For all directories, @fname->disk_name must be set.
+ * For casefolded directories, @fname->usr_fname must be set, and also
+ * @fname->cf_name if the filename is valid Unicode.
+ */
+void f2fs_hash_filename(const struct inode *dir, struct f2fs_filename *fname)
 {
-#ifdef CONFIG_UNICODE
-	struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
-	const struct unicode_map *um = sbi->s_encoding;
-	int r, dlen;
-	unsigned char *buff;
-	struct qstr folded;
+	const u8 *name = fname->disk_name.name;
+	size_t len = fname->disk_name.len;
 
-	if (!name_info->len || !IS_CASEFOLDED(dir))
-		goto opaque_seq;
+	WARN_ON_ONCE(!name);
 
-	buff = f2fs_kzalloc(sbi, sizeof(char) * PATH_MAX, GFP_KERNEL);
-	if (!buff)
-		return -ENOMEM;
-
-	dlen = utf8_casefold(um, name_info, buff, PATH_MAX);
-	if (dlen < 0) {
-		kvfree(buff);
-		goto opaque_seq;
+	if (is_dot_dotdot(name, len)) {
+		fname->hash = 0;
+		return;
 	}
-	folded.name = buff;
-	folded.len = dlen;
-	r = __f2fs_dentry_hash(&folded, fname);
 
-	kvfree(buff);
-	return r;
-
-opaque_seq:
+#ifdef CONFIG_UNICODE
+	if (IS_CASEFOLDED(dir)) {
+		/*
+		 * If the casefolded name is provided, hash it instead of the
+		 * on-disk name.  If the casefolded name is *not* provided, that
+		 * should only be because the name wasn't valid Unicode, so fall
+		 * back to treating the name as an opaque byte sequence.
+		 */
+		WARN_ON_ONCE(!fname->usr_fname->name);
+		if (fname->cf_name.name) {
+			name = fname->cf_name.name;
+			len = fname->cf_name.len;
+		} else {
+			name = fname->usr_fname->name;
+			len = fname->usr_fname->len;
+		}
+	}
 #endif
-	return __f2fs_dentry_hash(name_info, fname);
+	fname->hash = cpu_to_le32(TEA_hash_name(name, len));
 }
diff --git a/fs/f2fs/inline.c b/fs/f2fs/inline.c
index 9686ffe..dbade31 100644
--- a/fs/f2fs/inline.c
+++ b/fs/f2fs/inline.c
@@ -306,15 +306,14 @@ bool f2fs_recover_inline_data(struct inode *inode, struct page *npage)
 }
 
 struct f2fs_dir_entry *f2fs_find_in_inline_dir(struct inode *dir,
-			struct fscrypt_name *fname, struct page **res_page)
+					const struct f2fs_filename *fname,
+					struct page **res_page)
 {
 	struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
-	struct qstr name = FSTR_TO_QSTR(&fname->disk_name);
 	struct f2fs_dir_entry *de;
 	struct f2fs_dentry_ptr d;
 	struct page *ipage;
 	void *inline_dentry;
-	f2fs_hash_t namehash;
 
 	ipage = f2fs_get_node_page(sbi, dir->i_ino);
 	if (IS_ERR(ipage)) {
@@ -322,12 +321,10 @@ struct f2fs_dir_entry *f2fs_find_in_inline_dir(struct inode *dir,
 		return NULL;
 	}
 
-	namehash = f2fs_dentry_hash(dir, &name, fname);
-
 	inline_dentry = inline_data_addr(dir, ipage);
 
 	make_dentry_ptr_inline(dir, &d, inline_dentry);
-	de = f2fs_find_target_dentry(fname, namehash, NULL, &d);
+	de = f2fs_find_target_dentry(&d, fname, NULL);
 	unlock_page(ipage);
 	if (de)
 		*res_page = ipage;
@@ -444,7 +441,7 @@ static int f2fs_add_inline_entries(struct inode *dir, void *inline_dentry)
 
 	while (bit_pos < d.max) {
 		struct f2fs_dir_entry *de;
-		struct qstr new_name;
+		struct f2fs_filename fname;
 		nid_t ino;
 		umode_t fake_mode;
 
@@ -460,14 +457,19 @@ static int f2fs_add_inline_entries(struct inode *dir, void *inline_dentry)
 			continue;
 		}
 
-		new_name.name = d.filename[bit_pos];
-		new_name.len = le16_to_cpu(de->name_len);
+		/*
+		 * We only need the disk_name and hash to move the dentry.
+		 * We don't need the original or casefolded filenames.
+		 */
+		memset(&fname, 0, sizeof(fname));
+		fname.disk_name.name = d.filename[bit_pos];
+		fname.disk_name.len = le16_to_cpu(de->name_len);
+		fname.hash = de->hash_code;
 
 		ino = le32_to_cpu(de->ino);
 		fake_mode = f2fs_get_de_type(de) << S_SHIFT;
 
-		err = f2fs_add_regular_entry(dir, &new_name, NULL, NULL,
-							ino, fake_mode);
+		err = f2fs_add_regular_entry(dir, &fname, NULL, ino, fake_mode);
 		if (err)
 			goto punch_dentry_pages;
 
@@ -544,7 +546,7 @@ int f2fs_try_convert_inline_dir(struct inode *dir, struct dentry *dentry)
 {
 	struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 	struct page *ipage;
-	struct fscrypt_name fname;
+	struct f2fs_filename fname;
 	void *inline_dentry = NULL;
 	int err = 0;
 
@@ -553,19 +555,19 @@ int f2fs_try_convert_inline_dir(struct inode *dir, struct dentry *dentry)
 
 	f2fs_lock_op(sbi);
 
-	err = fscrypt_setup_filename(dir, &dentry->d_name, 0, &fname);
+	err = f2fs_setup_filename(dir, &dentry->d_name, 0, &fname);
 	if (err)
 		goto out;
 
 	ipage = f2fs_get_node_page(sbi, dir->i_ino);
 	if (IS_ERR(ipage)) {
 		err = PTR_ERR(ipage);
-		goto out;
+		goto out_fname;
 	}
 
 	if (f2fs_has_enough_room(dir, ipage, &fname)) {
 		f2fs_put_page(ipage, 1);
-		goto out;
+		goto out_fname;
 	}
 
 	inline_dentry = inline_data_addr(dir, ipage);
@@ -573,22 +575,22 @@ int f2fs_try_convert_inline_dir(struct inode *dir, struct dentry *dentry)
 	err = do_convert_inline_dir(dir, ipage, inline_dentry);
 	if (!err)
 		f2fs_put_page(ipage, 1);
+out_fname:
+	f2fs_free_filename(&fname);
 out:
 	f2fs_unlock_op(sbi);
 	return err;
 }
 
-int f2fs_add_inline_entry(struct inode *dir, const struct qstr *new_name,
-				const struct qstr *orig_name,
-				struct inode *inode, nid_t ino, umode_t mode)
+int f2fs_add_inline_entry(struct inode *dir, const struct f2fs_filename *fname,
+			  struct inode *inode, nid_t ino, umode_t mode)
 {
 	struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 	struct page *ipage;
 	unsigned int bit_pos;
-	f2fs_hash_t name_hash;
 	void *inline_dentry = NULL;
 	struct f2fs_dentry_ptr d;
-	int slots = GET_DENTRY_SLOTS(new_name->len);
+	int slots = GET_DENTRY_SLOTS(fname->disk_name.len);
 	struct page *page = NULL;
 	int err = 0;
 
@@ -610,8 +612,7 @@ int f2fs_add_inline_entry(struct inode *dir, const struct qstr *new_name,
 
 	if (inode) {
 		down_write(&F2FS_I(inode)->i_sem);
-		page = f2fs_init_inode_metadata(inode, dir, new_name,
-						orig_name, ipage);
+		page = f2fs_init_inode_metadata(inode, dir, fname, ipage);
 		if (IS_ERR(page)) {
 			err = PTR_ERR(page);
 			goto fail;
@@ -620,8 +621,8 @@ int f2fs_add_inline_entry(struct inode *dir, const struct qstr *new_name,
 
 	f2fs_wait_on_page_writeback(ipage, NODE, true, true);
 
-	name_hash = f2fs_dentry_hash(dir, new_name, NULL);
-	f2fs_update_dentry(ino, mode, &d, new_name, name_hash, bit_pos);
+	f2fs_update_dentry(ino, mode, &d, &fname->disk_name, fname->hash,
+			   bit_pos);
 
 	set_page_dirty(ipage);
 
diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c
index f54119d..e94e02c 100644
--- a/fs/f2fs/namei.c
+++ b/fs/f2fs/namei.c
@@ -482,7 +482,7 @@ static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry,
 	nid_t ino = -1;
 	int err = 0;
 	unsigned int root_ino = F2FS_ROOT_INO(F2FS_I_SB(dir));
-	struct fscrypt_name fname;
+	struct f2fs_filename fname;
 
 	trace_f2fs_lookup_start(dir, dentry, flags);
 
@@ -491,19 +491,20 @@ static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry,
 		goto out;
 	}
 
-	err = fscrypt_prepare_lookup(dir, dentry, &fname);
+	err = f2fs_prepare_lookup(dir, dentry, &fname);
 	if (err == -ENOENT)
 		goto out_splice;
 	if (err)
 		goto out;
 	de = __f2fs_find_entry(dir, &fname, &page);
-	fscrypt_free_filename(&fname);
+	f2fs_free_filename(&fname);
 
 	if (!de) {
 		if (IS_ERR(page)) {
 			err = PTR_ERR(page);
 			goto out;
 		}
+		err = -ENOENT;
 		goto out_splice;
 	}
 
@@ -549,7 +550,7 @@ static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry,
 #endif
 	new = d_splice_alias(inode, dentry);
 	err = PTR_ERR_OR_ZERO(new);
-	trace_f2fs_lookup_end(dir, dentry, ino, err);
+	trace_f2fs_lookup_end(dir, dentry, ino, !new ? -ENOENT : err);
 	return new;
 out_iput:
 	iput(inode);
@@ -564,7 +565,7 @@ static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
 	struct inode *inode = d_inode(dentry);
 	struct f2fs_dir_entry *de;
 	struct page *page;
-	int err = -ENOENT;
+	int err;
 
 	trace_f2fs_unlink_enter(dir, dentry);
 
@@ -1287,9 +1288,7 @@ const struct inode_operations f2fs_encrypted_symlink_inode_operations = {
 	.get_link       = f2fs_encrypted_get_link,
 	.getattr	= f2fs_getattr,
 	.setattr	= f2fs_setattr,
-#ifdef CONFIG_F2FS_FS_XATTR
 	.listxattr	= f2fs_listxattr,
-#endif
 };
 
 const struct inode_operations f2fs_dir_inode_operations = {
@@ -1307,9 +1306,7 @@ const struct inode_operations f2fs_dir_inode_operations = {
 	.setattr	= f2fs_setattr,
 	.get_acl	= f2fs_get_acl,
 	.set_acl	= f2fs_set_acl,
-#ifdef CONFIG_F2FS_FS_XATTR
 	.listxattr	= f2fs_listxattr,
-#endif
 	.fiemap		= f2fs_fiemap,
 };
 
@@ -1317,9 +1314,7 @@ const struct inode_operations f2fs_symlink_inode_operations = {
 	.get_link       = f2fs_get_link,
 	.getattr	= f2fs_getattr,
 	.setattr	= f2fs_setattr,
-#ifdef CONFIG_F2FS_FS_XATTR
 	.listxattr	= f2fs_listxattr,
-#endif
 };
 
 const struct inode_operations f2fs_special_inode_operations = {
@@ -1327,7 +1322,5 @@ const struct inode_operations f2fs_special_inode_operations = {
 	.setattr        = f2fs_setattr,
 	.get_acl	= f2fs_get_acl,
 	.set_acl	= f2fs_set_acl,
-#ifdef CONFIG_F2FS_FS_XATTR
 	.listxattr	= f2fs_listxattr,
-#endif
 };
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index ecbd6bd1..03e24df 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -1300,7 +1300,13 @@ static int read_node_page(struct page *page, int op_flags)
 	}
 
 	fio.new_blkaddr = fio.old_blkaddr = ni.blk_addr;
-	return f2fs_submit_page_bio(&fio);
+
+	err = f2fs_submit_page_bio(&fio);
+
+	if (!err)
+		f2fs_update_iostat(sbi, FS_NODE_READ_IO, F2FS_BLKSIZE);
+
+	return err;
 }
 
 /*
@@ -1514,8 +1520,15 @@ static int __write_node_page(struct page *page, bool atomic, bool *submitted,
 
 	trace_f2fs_writepage(page, NODE);
 
-	if (unlikely(f2fs_cp_error(sbi)))
+	if (unlikely(f2fs_cp_error(sbi))) {
+		if (is_sbi_flag_set(sbi, SBI_IS_CLOSE)) {
+			ClearPageUptodate(page);
+			dec_page_count(sbi, F2FS_DIRTY_NODES);
+			unlock_page(page);
+			return 0;
+		}
 		goto redirty_out;
+	}
 
 	if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
 		goto redirty_out;
@@ -1801,6 +1814,53 @@ static bool flush_dirty_inode(struct page *page)
 	return true;
 }
 
+int f2fs_flush_inline_data(struct f2fs_sb_info *sbi)
+{
+	pgoff_t index = 0;
+	struct pagevec pvec;
+	int nr_pages;
+	int ret = 0;
+
+	pagevec_init(&pvec);
+
+	while ((nr_pages = pagevec_lookup_tag(&pvec,
+			NODE_MAPPING(sbi), &index, PAGECACHE_TAG_DIRTY))) {
+		int i;
+
+		for (i = 0; i < nr_pages; i++) {
+			struct page *page = pvec.pages[i];
+
+			if (!IS_DNODE(page))
+				continue;
+
+			lock_page(page);
+
+			if (unlikely(page->mapping != NODE_MAPPING(sbi))) {
+continue_unlock:
+				unlock_page(page);
+				continue;
+			}
+
+			if (!PageDirty(page)) {
+				/* someone wrote it for us */
+				goto continue_unlock;
+			}
+
+			/* flush inline_data, if it's async context. */
+			if (is_inline_node(page)) {
+				clear_inline_node(page);
+				unlock_page(page);
+				flush_inline_data(sbi, ino_of_node(page));
+				continue;
+			}
+			unlock_page(page);
+		}
+		pagevec_release(&pvec);
+		cond_resched();
+	}
+	return ret;
+}
+
 int f2fs_sync_node_pages(struct f2fs_sb_info *sbi,
 				struct writeback_control *wbc,
 				bool do_balance, enum iostat_type io_type)
@@ -1864,8 +1924,8 @@ int f2fs_sync_node_pages(struct f2fs_sb_info *sbi,
 				goto continue_unlock;
 			}
 
-			/* flush inline_data */
-			if (is_inline_node(page)) {
+			/* flush inline_data, if it's async context. */
+			if (do_balance && is_inline_node(page)) {
 				clear_inline_node(page);
 				unlock_page(page);
 				flush_inline_data(sbi, ino_of_node(page));
@@ -2482,7 +2542,6 @@ void f2fs_alloc_nid_failed(struct f2fs_sb_info *sbi, nid_t nid)
 int f2fs_try_to_free_nids(struct f2fs_sb_info *sbi, int nr_shrink)
 {
 	struct f2fs_nm_info *nm_i = NM_I(sbi);
-	struct free_nid *i, *next;
 	int nr = nr_shrink;
 
 	if (nm_i->nid_cnt[FREE_NID] <= MAX_FREE_NIDS)
@@ -2491,17 +2550,23 @@ int f2fs_try_to_free_nids(struct f2fs_sb_info *sbi, int nr_shrink)
 	if (!mutex_trylock(&nm_i->build_lock))
 		return 0;
 
-	spin_lock(&nm_i->nid_list_lock);
-	list_for_each_entry_safe(i, next, &nm_i->free_nid_list, list) {
-		if (nr_shrink <= 0 ||
-				nm_i->nid_cnt[FREE_NID] <= MAX_FREE_NIDS)
-			break;
+	while (nr_shrink && nm_i->nid_cnt[FREE_NID] > MAX_FREE_NIDS) {
+		struct free_nid *i, *next;
+		unsigned int batch = SHRINK_NID_BATCH_SIZE;
 
-		__remove_free_nid(sbi, i, FREE_NID);
-		kmem_cache_free(free_nid_slab, i);
-		nr_shrink--;
+		spin_lock(&nm_i->nid_list_lock);
+		list_for_each_entry_safe(i, next, &nm_i->free_nid_list, list) {
+			if (!nr_shrink || !batch ||
+				nm_i->nid_cnt[FREE_NID] <= MAX_FREE_NIDS)
+				break;
+			__remove_free_nid(sbi, i, FREE_NID);
+			kmem_cache_free(free_nid_slab, i);
+			nr_shrink--;
+			batch--;
+		}
+		spin_unlock(&nm_i->nid_list_lock);
 	}
-	spin_unlock(&nm_i->nid_list_lock);
+
 	mutex_unlock(&nm_i->build_lock);
 
 	return nr - nr_shrink;
@@ -2928,7 +2993,7 @@ static int __get_nat_bitmaps(struct f2fs_sb_info *sbi)
 		return 0;
 
 	nm_i->nat_bits_blocks = F2FS_BLK_ALIGN((nat_bits_bytes << 1) + 8);
-	nm_i->nat_bits = f2fs_kzalloc(sbi,
+	nm_i->nat_bits = f2fs_kvzalloc(sbi,
 			nm_i->nat_bits_blocks << F2FS_BLKSIZE_BITS, GFP_KERNEL);
 	if (!nm_i->nat_bits)
 		return -ENOMEM;
@@ -3061,9 +3126,9 @@ static int init_free_nid_cache(struct f2fs_sb_info *sbi)
 	int i;
 
 	nm_i->free_nid_bitmap =
-		f2fs_kzalloc(sbi, array_size(sizeof(unsigned char *),
-					     nm_i->nat_blocks),
-			     GFP_KERNEL);
+		f2fs_kvzalloc(sbi, array_size(sizeof(unsigned char *),
+					      nm_i->nat_blocks),
+			      GFP_KERNEL);
 	if (!nm_i->free_nid_bitmap)
 		return -ENOMEM;
 
diff --git a/fs/f2fs/node.h b/fs/f2fs/node.h
index e05af5d..69e5859 100644
--- a/fs/f2fs/node.h
+++ b/fs/f2fs/node.h
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: GPL-2.0
+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  * fs/f2fs/node.h
  *
@@ -15,6 +15,9 @@
 #define FREE_NID_PAGES	8
 #define MAX_FREE_NIDS	(NAT_ENTRY_PER_BLOCK * FREE_NID_PAGES)
 
+/* size of free nid batch when shrinking */
+#define SHRINK_NID_BATCH_SIZE	8
+
 #define DEF_RA_NID_PAGES	0	/* # of nid pages to be readaheaded */
 
 /* maximum readahead size for node during getting data blocks */
diff --git a/fs/f2fs/recovery.c b/fs/f2fs/recovery.c
index dd804c0..ae5310f 100644
--- a/fs/f2fs/recovery.c
+++ b/fs/f2fs/recovery.c
@@ -107,13 +107,51 @@ static void del_fsync_inode(struct fsync_inode_entry *entry, int drop)
 	kmem_cache_free(fsync_entry_slab, entry);
 }
 
+static int init_recovered_filename(const struct inode *dir,
+				   struct f2fs_inode *raw_inode,
+				   struct f2fs_filename *fname,
+				   struct qstr *usr_fname)
+{
+	int err;
+
+	memset(fname, 0, sizeof(*fname));
+	fname->disk_name.len = le32_to_cpu(raw_inode->i_namelen);
+	fname->disk_name.name = raw_inode->i_name;
+
+	if (WARN_ON(fname->disk_name.len > F2FS_NAME_LEN))
+		return -ENAMETOOLONG;
+
+	if (!IS_ENCRYPTED(dir)) {
+		usr_fname->name = fname->disk_name.name;
+		usr_fname->len = fname->disk_name.len;
+		fname->usr_fname = usr_fname;
+	}
+
+	/* Compute the hash of the filename */
+	if (IS_CASEFOLDED(dir)) {
+		err = f2fs_init_casefolded_name(dir, fname);
+		if (err)
+			return err;
+		f2fs_hash_filename(dir, fname);
+#ifdef CONFIG_UNICODE
+		/* Case-sensitive match is fine for recovery */
+		kfree(fname->cf_name.name);
+		fname->cf_name.name = NULL;
+#endif
+	} else {
+		f2fs_hash_filename(dir, fname);
+	}
+	return 0;
+}
+
 static int recover_dentry(struct inode *inode, struct page *ipage,
 						struct list_head *dir_list)
 {
 	struct f2fs_inode *raw_inode = F2FS_INODE(ipage);
 	nid_t pino = le32_to_cpu(raw_inode->i_pino);
 	struct f2fs_dir_entry *de;
-	struct fscrypt_name fname;
+	struct f2fs_filename fname;
+	struct qstr usr_fname;
 	struct page *page;
 	struct inode *dir, *einode;
 	struct fsync_inode_entry *entry;
@@ -132,16 +170,9 @@ static int recover_dentry(struct inode *inode, struct page *ipage,
 	}
 
 	dir = entry->inode;
-
-	memset(&fname, 0, sizeof(struct fscrypt_name));
-	fname.disk_name.len = le32_to_cpu(raw_inode->i_namelen);
-	fname.disk_name.name = raw_inode->i_name;
-
-	if (unlikely(fname.disk_name.len > F2FS_NAME_LEN)) {
-		WARN_ON(1);
-		err = -ENAMETOOLONG;
+	err = init_recovered_filename(dir, raw_inode, &fname, &usr_fname);
+	if (err)
 		goto out;
-	}
 retry:
 	de = __f2fs_find_entry(dir, &fname, &page);
 	if (de && inode->i_ino == le32_to_cpu(de->ino))
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index b7a9421..196f315 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -1029,9 +1029,9 @@ static void f2fs_submit_discard_endio(struct bio *bio)
 	struct discard_cmd *dc = (struct discard_cmd *)bio->bi_private;
 	unsigned long flags;
 
-	dc->error = blk_status_to_errno(bio->bi_status);
-
 	spin_lock_irqsave(&dc->lock, flags);
+	if (!dc->error)
+		dc->error = blk_status_to_errno(bio->bi_status);
 	dc->bio_ref--;
 	if (!dc->bio_ref && dc->state == D_SUBMIT) {
 		dc->state = D_DONE;
@@ -1101,7 +1101,6 @@ static void __init_discard_policy(struct f2fs_sb_info *sbi,
 	} else if (discard_type == DPOLICY_FSTRIM) {
 		dpolicy->io_aware = false;
 	} else if (discard_type == DPOLICY_UMOUNT) {
-		dpolicy->max_requests = UINT_MAX;
 		dpolicy->io_aware = false;
 		/* we need to issue all to keep CP_TRIMMED_FLAG */
 		dpolicy->granularity = 1;
@@ -1215,12 +1214,14 @@ static int __submit_discard_cmd(struct f2fs_sb_info *sbi,
 		len = total_len;
 	}
 
-	if (!err && len)
+	if (!err && len) {
+		dcc->undiscard_blks -= len;
 		__update_discard_tree_range(sbi, bdev, lstart, start, len);
+	}
 	return err;
 }
 
-static struct discard_cmd *__insert_discard_tree(struct f2fs_sb_info *sbi,
+static void __insert_discard_tree(struct f2fs_sb_info *sbi,
 				struct block_device *bdev, block_t lstart,
 				block_t start, block_t len,
 				struct rb_node **insert_p,
@@ -1229,7 +1230,6 @@ static struct discard_cmd *__insert_discard_tree(struct f2fs_sb_info *sbi,
 	struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
 	struct rb_node **p;
 	struct rb_node *parent = NULL;
-	struct discard_cmd *dc = NULL;
 	bool leftmost = true;
 
 	if (insert_p && insert_parent) {
@@ -1241,12 +1241,8 @@ static struct discard_cmd *__insert_discard_tree(struct f2fs_sb_info *sbi,
 	p = f2fs_lookup_rb_tree_for_insert(sbi, &dcc->root, &parent,
 							lstart, &leftmost);
 do_insert:
-	dc = __attach_discard_cmd(sbi, bdev, lstart, start, len, parent,
+	__attach_discard_cmd(sbi, bdev, lstart, start, len, parent,
 								p, leftmost);
-	if (!dc)
-		return NULL;
-
-	return dc;
 }
 
 static void __relocate_discard_cmd(struct discard_cmd_control *dcc,
@@ -1463,6 +1459,8 @@ static unsigned int __issue_discard_cmd_orderly(struct f2fs_sb_info *sbi,
 
 	return issued;
 }
+static unsigned int __wait_all_discard_cmd(struct f2fs_sb_info *sbi,
+					struct discard_policy *dpolicy);
 
 static int __issue_discard_cmd(struct f2fs_sb_info *sbi,
 					struct discard_policy *dpolicy)
@@ -1471,12 +1469,14 @@ static int __issue_discard_cmd(struct f2fs_sb_info *sbi,
 	struct list_head *pend_list;
 	struct discard_cmd *dc, *tmp;
 	struct blk_plug plug;
-	int i, issued = 0;
+	int i, issued;
 	bool io_interrupted = false;
 
 	if (dpolicy->timeout)
 		f2fs_update_time(sbi, UMOUNT_DISCARD_TIMEOUT);
 
+retry:
+	issued = 0;
 	for (i = MAX_PLIST_NUM - 1; i >= 0; i--) {
 		if (dpolicy->timeout &&
 				f2fs_time_over(sbi, UMOUNT_DISCARD_TIMEOUT))
@@ -1523,6 +1523,11 @@ static int __issue_discard_cmd(struct f2fs_sb_info *sbi,
 			break;
 	}
 
+	if (dpolicy->type == DPOLICY_UMOUNT && issued) {
+		__wait_all_discard_cmd(sbi, dpolicy);
+		goto retry;
+	}
+
 	if (!issued && io_interrupted)
 		issued = -1;
 
@@ -3102,6 +3107,14 @@ void f2fs_allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
 		type = CURSEG_COLD_DATA;
 	}
 
+	/*
+	 * We need to wait for node_write to avoid block allocation during
+	 * checkpoint. This can only happen to quota writes which can cause
+	 * the below discard race condition.
+	 */
+	if (IS_DATASEG(type))
+		down_write(&sbi->node_write);
+
 	down_read(&SM_I(sbi)->curseg_lock);
 
 	mutex_lock(&curseg->curseg_mutex);
@@ -3167,6 +3180,9 @@ void f2fs_allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
 
 	up_read(&SM_I(sbi)->curseg_lock);
 
+	if (IS_DATASEG(type))
+		up_write(&sbi->node_write);
+
 	if (put_pin_sem)
 		up_read(&sbi->pin_sem);
 }
diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h
index 7a83bd5..cba16cc 100644
--- a/fs/f2fs/segment.h
+++ b/fs/f2fs/segment.h
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: GPL-2.0
+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  * fs/f2fs/segment.h
  *
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 8a99559..20e56b0 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -285,6 +285,22 @@ static inline void limit_reserve_root(struct f2fs_sb_info *sbi)
 					   F2FS_OPTION(sbi).s_resgid));
 }
 
+static inline void adjust_unusable_cap_perc(struct f2fs_sb_info *sbi)
+{
+	if (!F2FS_OPTION(sbi).unusable_cap_perc)
+		return;
+
+	if (F2FS_OPTION(sbi).unusable_cap_perc == 100)
+		F2FS_OPTION(sbi).unusable_cap = sbi->user_block_count;
+	else
+		F2FS_OPTION(sbi).unusable_cap = (sbi->user_block_count / 100) *
+					F2FS_OPTION(sbi).unusable_cap_perc;
+
+	f2fs_info(sbi, "Adjust unusable cap for checkpoint=disable = %u / %u%%",
+			F2FS_OPTION(sbi).unusable_cap,
+			F2FS_OPTION(sbi).unusable_cap_perc);
+}
+
 static void init_once(void *foo)
 {
 	struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo;
@@ -471,11 +487,11 @@ static int parse_options(struct super_block *sb, char *options, bool is_remount)
 
 			if (!name)
 				return -ENOMEM;
-			if (strlen(name) == 2 && !strncmp(name, "on", 2)) {
+			if (!strcmp(name, "on")) {
 				F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
-			} else if (strlen(name) == 3 && !strncmp(name, "off", 3)) {
+			} else if (!strcmp(name, "off")) {
 				F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_OFF;
-			} else if (strlen(name) == 4 && !strncmp(name, "sync", 4)) {
+			} else if (!strcmp(name, "sync")) {
 				F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_SYNC;
 			} else {
 				kvfree(name);
@@ -635,16 +651,14 @@ static int parse_options(struct super_block *sb, char *options, bool is_remount)
 
 			if (!name)
 				return -ENOMEM;
-			if (strlen(name) == 8 &&
-					!strncmp(name, "adaptive", 8)) {
+			if (!strcmp(name, "adaptive")) {
 				if (f2fs_sb_has_blkzoned(sbi)) {
 					f2fs_warn(sbi, "adaptive mode is not allowed with zoned block device feature");
 					kvfree(name);
 					return -EINVAL;
 				}
 				F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
-			} else if (strlen(name) == 3 &&
-					!strncmp(name, "lfs", 3)) {
+			} else if (!strcmp(name, "lfs")) {
 				F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
 			} else {
 				kvfree(name);
@@ -769,14 +783,11 @@ static int parse_options(struct super_block *sb, char *options, bool is_remount)
 			name = match_strdup(&args[0]);
 			if (!name)
 				return -ENOMEM;
-			if (strlen(name) == 10 &&
-					!strncmp(name, "user-based", 10)) {
+			if (!strcmp(name, "user-based")) {
 				F2FS_OPTION(sbi).whint_mode = WHINT_MODE_USER;
-			} else if (strlen(name) == 3 &&
-					!strncmp(name, "off", 3)) {
+			} else if (!strcmp(name, "off")) {
 				F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
-			} else if (strlen(name) == 8 &&
-					!strncmp(name, "fs-based", 8)) {
+			} else if (!strcmp(name, "fs-based")) {
 				F2FS_OPTION(sbi).whint_mode = WHINT_MODE_FS;
 			} else {
 				kvfree(name);
@@ -789,11 +800,9 @@ static int parse_options(struct super_block *sb, char *options, bool is_remount)
 			if (!name)
 				return -ENOMEM;
 
-			if (strlen(name) == 7 &&
-					!strncmp(name, "default", 7)) {
+			if (!strcmp(name, "default")) {
 				F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
-			} else if (strlen(name) == 5 &&
-					!strncmp(name, "reuse", 5)) {
+			} else if (!strcmp(name, "reuse")) {
 				F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
 			} else {
 				kvfree(name);
@@ -805,14 +814,11 @@ static int parse_options(struct super_block *sb, char *options, bool is_remount)
 			name = match_strdup(&args[0]);
 			if (!name)
 				return -ENOMEM;
-			if (strlen(name) == 5 &&
-					!strncmp(name, "posix", 5)) {
+			if (!strcmp(name, "posix")) {
 				F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
-			} else if (strlen(name) == 6 &&
-					!strncmp(name, "strict", 6)) {
+			} else if (!strcmp(name, "strict")) {
 				F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_STRICT;
-			} else if (strlen(name) == 9 &&
-					!strncmp(name, "nobarrier", 9)) {
+			} else if (!strcmp(name, "nobarrier")) {
 				F2FS_OPTION(sbi).fsync_mode =
 							FSYNC_MODE_NOBARRIER;
 			} else {
@@ -832,12 +838,7 @@ static int parse_options(struct super_block *sb, char *options, bool is_remount)
 				return -EINVAL;
 			if (arg < 0 || arg > 100)
 				return -EINVAL;
-			if (arg == 100)
-				F2FS_OPTION(sbi).unusable_cap =
-					sbi->user_block_count;
-			else
-				F2FS_OPTION(sbi).unusable_cap =
-					(sbi->user_block_count / 100) *	arg;
+			F2FS_OPTION(sbi).unusable_cap_perc = arg;
 			set_opt(sbi, DISABLE_CHECKPOINT);
 			break;
 		case Opt_checkpoint_disable_cap:
@@ -860,17 +861,18 @@ static int parse_options(struct super_block *sb, char *options, bool is_remount)
 			name = match_strdup(&args[0]);
 			if (!name)
 				return -ENOMEM;
-			if (strlen(name) == 3 && !strcmp(name, "lzo")) {
+			if (!strcmp(name, "lzo")) {
 				F2FS_OPTION(sbi).compress_algorithm =
 								COMPRESS_LZO;
-			} else if (strlen(name) == 3 &&
-					!strcmp(name, "lz4")) {
+			} else if (!strcmp(name, "lz4")) {
 				F2FS_OPTION(sbi).compress_algorithm =
 								COMPRESS_LZ4;
-			} else if (strlen(name) == 4 &&
-					!strcmp(name, "zstd")) {
+			} else if (!strcmp(name, "zstd")) {
 				F2FS_OPTION(sbi).compress_algorithm =
 								COMPRESS_ZSTD;
+			} else if (!strcmp(name, "lzo-rle")) {
+				F2FS_OPTION(sbi).compress_algorithm =
+								COMPRESS_LZORLE;
 			} else {
 				kfree(name);
 				return -EINVAL;
@@ -1330,7 +1332,8 @@ static int f2fs_statfs_project(struct super_block *sb,
 		limit >>= sb->s_blocksize_bits;
 
 	if (limit && buf->f_blocks > limit) {
-		curblock = dquot->dq_dqb.dqb_curspace >> sb->s_blocksize_bits;
+		curblock = (dquot->dq_dqb.dqb_curspace +
+			    dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits;
 		buf->f_blocks = limit;
 		buf->f_bfree = buf->f_bavail =
 			(buf->f_blocks > curblock) ?
@@ -1465,6 +1468,9 @@ static inline void f2fs_show_compress_options(struct seq_file *seq,
 	case COMPRESS_ZSTD:
 		algtype = "zstd";
 		break;
+	case COMPRESS_LZORLE:
+		algtype = "lzo-rle";
+		break;
 	}
 	seq_printf(seq, ",compress_algorithm=%s", algtype);
 
@@ -1880,6 +1886,7 @@ static int f2fs_remount(struct super_block *sb, int *flags, char *data)
 		(test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
 
 	limit_reserve_root(sbi);
+	adjust_unusable_cap_perc(sbi);
 	*flags = (*flags & ~SB_LAZYTIME) | (sb->s_flags & SB_LAZYTIME);
 	return 0;
 restore_gc:
@@ -3062,7 +3069,7 @@ static int init_blkz_info(struct f2fs_sb_info *sbi, int devi)
 	if (nr_sectors & (bdev_zone_sectors(bdev) - 1))
 		FDEV(devi).nr_blkz++;
 
-	FDEV(devi).blkz_seq = f2fs_kzalloc(sbi,
+	FDEV(devi).blkz_seq = f2fs_kvzalloc(sbi,
 					BITS_TO_LONGS(FDEV(devi).nr_blkz)
 					* sizeof(unsigned long),
 					GFP_KERNEL);
@@ -3449,7 +3456,6 @@ static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
 	init_rwsem(&sbi->gc_lock);
 	mutex_init(&sbi->writepages);
 	mutex_init(&sbi->cp_mutex);
-	mutex_init(&sbi->resize_mutex);
 	init_rwsem(&sbi->node_write);
 	init_rwsem(&sbi->node_change);
 
@@ -3460,6 +3466,7 @@ static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
 	/* init iostat info */
 	spin_lock_init(&sbi->iostat_lock);
 	sbi->iostat_enable = false;
+	sbi->iostat_period_ms = DEFAULT_IOSTAT_PERIOD_MS;
 
 	for (i = 0; i < NR_PAGE_TYPE; i++) {
 		int n = (i == META) ? 1: NR_TEMP_TYPE;
@@ -3557,6 +3564,7 @@ static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
 	sbi->reserved_blocks = 0;
 	sbi->current_reserved_blocks = 0;
 	limit_reserve_root(sbi);
+	adjust_unusable_cap_perc(sbi);
 
 	for (i = 0; i < NR_INODE_TYPE; i++) {
 		INIT_LIST_HEAD(&sbi->inode_list[i]);
@@ -3927,7 +3935,12 @@ static int __init init_f2fs_fs(void)
 	err = f2fs_init_bioset();
 	if (err)
 		goto free_bio_enrty_cache;
+	err = f2fs_init_compress_mempool();
+	if (err)
+		goto free_bioset;
 	return 0;
+free_bioset:
+	f2fs_destroy_bioset();
 free_bio_enrty_cache:
 	f2fs_destroy_bio_entry_cache();
 free_post_read:
@@ -3955,6 +3968,7 @@ static int __init init_f2fs_fs(void)
 
 static void __exit exit_f2fs_fs(void)
 {
+	f2fs_destroy_compress_mempool();
 	f2fs_destroy_bioset();
 	f2fs_destroy_bio_entry_cache();
 	f2fs_destroy_post_read_processing();
diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c
index 3162f46..e877c59 100644
--- a/fs/f2fs/sysfs.c
+++ b/fs/f2fs/sysfs.c
@@ -15,6 +15,7 @@
 #include "f2fs.h"
 #include "segment.h"
 #include "gc.h"
+#include <trace/events/f2fs.h>
 
 static struct proc_dir_entry *f2fs_proc_root;
 
@@ -372,7 +373,6 @@ static ssize_t __sbi_store(struct f2fs_attr *a,
 		return count;
 	}
 
-
 	if (!strcmp(a->attr.name, "iostat_enable")) {
 		sbi->iostat_enable = !!t;
 		if (!sbi->iostat_enable)
@@ -380,6 +380,15 @@ static ssize_t __sbi_store(struct f2fs_attr *a,
 		return count;
 	}
 
+	if (!strcmp(a->attr.name, "iostat_period_ms")) {
+		if (t < MIN_IOSTAT_PERIOD_MS || t > MAX_IOSTAT_PERIOD_MS)
+			return -EINVAL;
+		spin_lock(&sbi->iostat_lock);
+		sbi->iostat_period_ms = (unsigned int)t;
+		spin_unlock(&sbi->iostat_lock);
+		return count;
+	}
+
 	*ui = (unsigned int)t;
 
 	return count;
@@ -538,6 +547,7 @@ F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_idle_interval, interval_time[GC_TIME]);
 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info,
 		umount_discard_timeout, interval_time[UMOUNT_DISCARD_TIMEOUT]);
 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, iostat_enable, iostat_enable);
+F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, iostat_period_ms, iostat_period_ms);
 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, readdir_ra, readdir_ra);
 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_pin_file_thresh, gc_pin_file_threshold);
 F2FS_RW_ATTR(F2FS_SBI, f2fs_super_block, extension_list, extension_list);
@@ -545,6 +555,8 @@ F2FS_RW_ATTR(F2FS_SBI, f2fs_super_block, extension_list, extension_list);
 F2FS_RW_ATTR(FAULT_INFO_RATE, f2fs_fault_info, inject_rate, inject_rate);
 F2FS_RW_ATTR(FAULT_INFO_TYPE, f2fs_fault_info, inject_type, inject_type);
 #endif
+F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, data_io_flag, data_io_flag);
+F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, node_io_flag, node_io_flag);
 F2FS_GENERAL_RO_ATTR(dirty_segments);
 F2FS_GENERAL_RO_ATTR(free_segments);
 F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes);
@@ -618,6 +630,7 @@ static struct attribute *f2fs_attrs[] = {
 	ATTR_LIST(gc_idle_interval),
 	ATTR_LIST(umount_discard_timeout),
 	ATTR_LIST(iostat_enable),
+	ATTR_LIST(iostat_period_ms),
 	ATTR_LIST(readdir_ra),
 	ATTR_LIST(gc_pin_file_thresh),
 	ATTR_LIST(extension_list),
@@ -625,6 +638,8 @@ static struct attribute *f2fs_attrs[] = {
 	ATTR_LIST(inject_rate),
 	ATTR_LIST(inject_type),
 #endif
+	ATTR_LIST(data_io_flag),
+	ATTR_LIST(node_io_flag),
 	ATTR_LIST(dirty_segments),
 	ATTR_LIST(free_segments),
 	ATTR_LIST(unusable),
@@ -754,6 +769,33 @@ static int __maybe_unused segment_bits_seq_show(struct seq_file *seq,
 	return 0;
 }
 
+void f2fs_record_iostat(struct f2fs_sb_info *sbi)
+{
+	unsigned long long iostat_diff[NR_IO_TYPE];
+	int i;
+
+	if (time_is_after_jiffies(sbi->iostat_next_period))
+		return;
+
+	/* Need double check under the lock */
+	spin_lock(&sbi->iostat_lock);
+	if (time_is_after_jiffies(sbi->iostat_next_period)) {
+		spin_unlock(&sbi->iostat_lock);
+		return;
+	}
+	sbi->iostat_next_period = jiffies +
+				msecs_to_jiffies(sbi->iostat_period_ms);
+
+	for (i = 0; i < NR_IO_TYPE; i++) {
+		iostat_diff[i] = sbi->rw_iostat[i] -
+				sbi->prev_rw_iostat[i];
+		sbi->prev_rw_iostat[i] = sbi->rw_iostat[i];
+	}
+	spin_unlock(&sbi->iostat_lock);
+
+	trace_f2fs_iostat(sbi, iostat_diff);
+}
+
 static int __maybe_unused iostat_info_seq_show(struct seq_file *seq,
 					       void *offset)
 {
@@ -766,33 +808,58 @@ static int __maybe_unused iostat_info_seq_show(struct seq_file *seq,
 
 	seq_printf(seq, "time:		%-16llu\n", now);
 
-	/* print app IOs */
+	/* print app write IOs */
+	seq_puts(seq, "[WRITE]\n");
 	seq_printf(seq, "app buffered:	%-16llu\n",
-				sbi->write_iostat[APP_BUFFERED_IO]);
+				sbi->rw_iostat[APP_BUFFERED_IO]);
 	seq_printf(seq, "app direct:	%-16llu\n",
-				sbi->write_iostat[APP_DIRECT_IO]);
+				sbi->rw_iostat[APP_DIRECT_IO]);
 	seq_printf(seq, "app mapped:	%-16llu\n",
-				sbi->write_iostat[APP_MAPPED_IO]);
+				sbi->rw_iostat[APP_MAPPED_IO]);
 
-	/* print fs IOs */
+	/* print fs write IOs */
 	seq_printf(seq, "fs data:	%-16llu\n",
-				sbi->write_iostat[FS_DATA_IO]);
+				sbi->rw_iostat[FS_DATA_IO]);
 	seq_printf(seq, "fs node:	%-16llu\n",
-				sbi->write_iostat[FS_NODE_IO]);
+				sbi->rw_iostat[FS_NODE_IO]);
 	seq_printf(seq, "fs meta:	%-16llu\n",
-				sbi->write_iostat[FS_META_IO]);
+				sbi->rw_iostat[FS_META_IO]);
 	seq_printf(seq, "fs gc data:	%-16llu\n",
-				sbi->write_iostat[FS_GC_DATA_IO]);
+				sbi->rw_iostat[FS_GC_DATA_IO]);
 	seq_printf(seq, "fs gc node:	%-16llu\n",
-				sbi->write_iostat[FS_GC_NODE_IO]);
+				sbi->rw_iostat[FS_GC_NODE_IO]);
 	seq_printf(seq, "fs cp data:	%-16llu\n",
-				sbi->write_iostat[FS_CP_DATA_IO]);
+				sbi->rw_iostat[FS_CP_DATA_IO]);
 	seq_printf(seq, "fs cp node:	%-16llu\n",
-				sbi->write_iostat[FS_CP_NODE_IO]);
+				sbi->rw_iostat[FS_CP_NODE_IO]);
 	seq_printf(seq, "fs cp meta:	%-16llu\n",
-				sbi->write_iostat[FS_CP_META_IO]);
+				sbi->rw_iostat[FS_CP_META_IO]);
+
+	/* print app read IOs */
+	seq_puts(seq, "[READ]\n");
+	seq_printf(seq, "app buffered:	%-16llu\n",
+				sbi->rw_iostat[APP_BUFFERED_READ_IO]);
+	seq_printf(seq, "app direct:	%-16llu\n",
+				sbi->rw_iostat[APP_DIRECT_READ_IO]);
+	seq_printf(seq, "app mapped:	%-16llu\n",
+				sbi->rw_iostat[APP_MAPPED_READ_IO]);
+
+	/* print fs read IOs */
+	seq_printf(seq, "fs data:	%-16llu\n",
+				sbi->rw_iostat[FS_DATA_READ_IO]);
+	seq_printf(seq, "fs gc data:	%-16llu\n",
+				sbi->rw_iostat[FS_GDATA_READ_IO]);
+	seq_printf(seq, "fs compr_data:	%-16llu\n",
+				sbi->rw_iostat[FS_CDATA_READ_IO]);
+	seq_printf(seq, "fs node:	%-16llu\n",
+				sbi->rw_iostat[FS_NODE_READ_IO]);
+	seq_printf(seq, "fs meta:	%-16llu\n",
+				sbi->rw_iostat[FS_META_READ_IO]);
+
+	/* print other IOs */
+	seq_puts(seq, "[OTHER]\n");
 	seq_printf(seq, "fs discard:	%-16llu\n",
-				sbi->write_iostat[FS_DISCARD]);
+				sbi->rw_iostat[FS_DISCARD]);
 
 	return 0;
 }
diff --git a/fs/f2fs/trace.h b/fs/f2fs/trace.h
index e8075fc..789f6aa 100644
--- a/fs/f2fs/trace.h
+++ b/fs/f2fs/trace.h
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: GPL-2.0
+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  * f2fs IO tracer
  *
diff --git a/fs/f2fs/xattr.h b/fs/f2fs/xattr.h
index 938fcd2..416d6527 100644
--- a/fs/f2fs/xattr.h
+++ b/fs/f2fs/xattr.h
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: GPL-2.0
+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  * fs/f2fs/xattr.h
  *
@@ -136,6 +136,7 @@ extern void f2fs_destroy_xattr_caches(struct f2fs_sb_info *);
 #else
 
 #define f2fs_xattr_handlers	NULL
+#define f2fs_listxattr		NULL
 static inline int f2fs_setxattr(struct inode *inode, int index,
 		const char *name, const void *value, size_t size,
 		struct page *page, int flags)
@@ -148,11 +149,6 @@ static inline int f2fs_getxattr(struct inode *inode, int index,
 {
 	return -EOPNOTSUPP;
 }
-static inline ssize_t f2fs_listxattr(struct dentry *dentry, char *buffer,
-		size_t buffer_size)
-{
-	return -EOPNOTSUPP;
-}
 static inline int f2fs_init_xattr_caches(struct f2fs_sb_info *sbi) { return 0; }
 static inline void f2fs_destroy_xattr_caches(struct f2fs_sb_info *sbi) { }
 #endif
diff --git a/include/trace/events/f2fs.h b/include/trace/events/f2fs.h
index 24c2557..8639ab9 100644
--- a/include/trace/events/f2fs.h
+++ b/include/trace/events/f2fs.h
@@ -50,6 +50,7 @@ TRACE_DEFINE_ENUM(CP_RECOVERY);
 TRACE_DEFINE_ENUM(CP_DISCARD);
 TRACE_DEFINE_ENUM(CP_TRIMMED);
 TRACE_DEFINE_ENUM(CP_PAUSE);
+TRACE_DEFINE_ENUM(CP_RESIZE);
 
 #define show_block_type(type)						\
 	__print_symbolic(type,						\
@@ -126,7 +127,8 @@ TRACE_DEFINE_ENUM(CP_PAUSE);
 		{ CP_RECOVERY,	"Recovery" },				\
 		{ CP_DISCARD,	"Discard" },				\
 		{ CP_PAUSE,	"Pause" },				\
-		{ CP_TRIMMED,	"Trimmed" })
+		{ CP_TRIMMED,	"Trimmed" },				\
+		{ CP_RESIZE,	"Resize" })
 
 #define show_fsync_cpreason(type)					\
 	__print_symbolic(type,						\
@@ -154,7 +156,8 @@ TRACE_DEFINE_ENUM(CP_PAUSE);
 	__print_symbolic(type,						\
 		{ COMPRESS_LZO,		"LZO" },			\
 		{ COMPRESS_LZ4,		"LZ4" },			\
-		{ COMPRESS_ZSTD,	"ZSTD" })
+		{ COMPRESS_ZSTD,	"ZSTD" },			\
+		{ COMPRESS_LZORLE,	"LZO-RLE" })
 
 struct f2fs_sb_info;
 struct f2fs_io_info;
@@ -1812,6 +1815,82 @@ DEFINE_EVENT(f2fs_zip_end, f2fs_decompress_pages_end,
 	TP_ARGS(inode, cluster_idx, compressed_size, ret)
 );
 
+TRACE_EVENT(f2fs_iostat,
+
+	TP_PROTO(struct f2fs_sb_info *sbi, unsigned long long *iostat),
+
+	TP_ARGS(sbi, iostat),
+
+	TP_STRUCT__entry(
+		__field(dev_t,	dev)
+		__field(unsigned long long,	app_dio)
+		__field(unsigned long long,	app_bio)
+		__field(unsigned long long,	app_wio)
+		__field(unsigned long long,	app_mio)
+		__field(unsigned long long,	fs_dio)
+		__field(unsigned long long,	fs_nio)
+		__field(unsigned long long,	fs_mio)
+		__field(unsigned long long,	fs_gc_dio)
+		__field(unsigned long long,	fs_gc_nio)
+		__field(unsigned long long,	fs_cp_dio)
+		__field(unsigned long long,	fs_cp_nio)
+		__field(unsigned long long,	fs_cp_mio)
+		__field(unsigned long long,	app_drio)
+		__field(unsigned long long,	app_brio)
+		__field(unsigned long long,	app_rio)
+		__field(unsigned long long,	app_mrio)
+		__field(unsigned long long,	fs_drio)
+		__field(unsigned long long,	fs_gdrio)
+		__field(unsigned long long,	fs_cdrio)
+		__field(unsigned long long,	fs_nrio)
+		__field(unsigned long long,	fs_mrio)
+		__field(unsigned long long,	fs_discard)
+	),
+
+	TP_fast_assign(
+		__entry->dev		= sbi->sb->s_dev;
+		__entry->app_dio	= iostat[APP_DIRECT_IO];
+		__entry->app_bio	= iostat[APP_BUFFERED_IO];
+		__entry->app_wio	= iostat[APP_WRITE_IO];
+		__entry->app_mio	= iostat[APP_MAPPED_IO];
+		__entry->fs_dio		= iostat[FS_DATA_IO];
+		__entry->fs_nio		= iostat[FS_NODE_IO];
+		__entry->fs_mio		= iostat[FS_META_IO];
+		__entry->fs_gc_dio	= iostat[FS_GC_DATA_IO];
+		__entry->fs_gc_nio	= iostat[FS_GC_NODE_IO];
+		__entry->fs_cp_dio	= iostat[FS_CP_DATA_IO];
+		__entry->fs_cp_nio	= iostat[FS_CP_NODE_IO];
+		__entry->fs_cp_mio	= iostat[FS_CP_META_IO];
+		__entry->app_drio	= iostat[APP_DIRECT_READ_IO];
+		__entry->app_brio	= iostat[APP_BUFFERED_READ_IO];
+		__entry->app_rio	= iostat[APP_READ_IO];
+		__entry->app_mrio	= iostat[APP_MAPPED_READ_IO];
+		__entry->fs_drio	= iostat[FS_DATA_READ_IO];
+		__entry->fs_gdrio	= iostat[FS_GDATA_READ_IO];
+		__entry->fs_cdrio	= iostat[FS_CDATA_READ_IO];
+		__entry->fs_nrio	= iostat[FS_NODE_READ_IO];
+		__entry->fs_mrio	= iostat[FS_META_READ_IO];
+		__entry->fs_discard	= iostat[FS_DISCARD];
+	),
+
+	TP_printk("dev = (%d,%d), "
+		"app [write=%llu (direct=%llu, buffered=%llu), mapped=%llu], "
+		"fs [data=%llu, node=%llu, meta=%llu, discard=%llu], "
+		"gc [data=%llu, node=%llu], "
+		"cp [data=%llu, node=%llu, meta=%llu], "
+		"app [read=%llu (direct=%llu, buffered=%llu), mapped=%llu], "
+		"fs [data=%llu, (gc_data=%llu, compr_data=%llu), "
+		"node=%llu, meta=%llu]",
+		show_dev(__entry->dev), __entry->app_wio, __entry->app_dio,
+		__entry->app_bio, __entry->app_mio, __entry->fs_dio,
+		__entry->fs_nio, __entry->fs_mio, __entry->fs_discard,
+		__entry->fs_gc_dio, __entry->fs_gc_nio, __entry->fs_cp_dio,
+		__entry->fs_cp_nio, __entry->fs_cp_mio,
+		__entry->app_rio, __entry->app_drio, __entry->app_brio,
+		__entry->app_mrio, __entry->fs_drio, __entry->fs_gdrio,
+		__entry->fs_cdrio, __entry->fs_nrio, __entry->fs_mrio)
+);
+
 #endif /* _TRACE_F2FS_H */
 
  /* This part must be outside protection */